* configure.ac: Set WITH_SYSCTL only on Linux hosts
* daemon/Makefile.am: Conditionalize install-sysctl using WITH_SYSCTL
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
Cc: Jason Helfman <jhelfman@e-e.com>

The /usr/include/python/pyconfig.h file pollutes the global
namespace with a huge number of HAVE_XXX and WITH_XXX
defines. These change what we detected in our own config.h
In particular if you try to build without DTrace, python's
headers turn it back on with predictable fail.

THe hack to workaround this is to rename WITH_DTRACE to
WITH_DTRACE_PROBES to avoid the namespace clash

Our syntax checker missed all-lower-case variables (this will
be fixed by the next .gnulib update).  Additionally, anywhere
that we mix in-tree files with generated files, automake recommends
listing builddir prior to srcdir for VPATH builds.

* src/Makefile.am (*_la_CFLAGS): Favor $(top_srcdir).
(INCLUDES): Likewise, and follow automake recommendations on
builddir before srcdir.
* python/Makefile.am (INCLUDES): Swap directory order.
* tests/Makefile.am (INCLUDES): Likewise.
* tools/Makefile.am (INCLUDES): Likewise.
* daemon/Makefile.am (INCLUDES): Likewise.
(libvirtd.init, libvirtd.service): Favor $().
* examples/hellolibvirt/Makefile.am (hellolibvirt_LDADD):
Likewise.
* examples/openauth/Makefile.am (openauth_LDADD): Likewise.
* examples/dominfo/Makefile.am (INCLUDES): Drop dead include.
* examples/domsuspend/Makefile.am (INCLUDES): Likewise.

Commit 4d9e51f6 fixed a 'make uninstall' failure, but failed
to follow other conventions already present in src/Makefile.am.
In particular, we prefer MKDIR_P over mkdir -p, and should
have a matching rmdir during uninstall for every directory
created during install (the idea being that uninstall in a
DESTDIR should be clean, while installation in the final
system should not fail with non-empty directories left behind).

* tools/Makefile.am (install-sysconfig, install-initscript)
(install-systemd): Use MKDIR_P.
(uninstall-sysconfig, uninstall-initscript, uninstall-systemd):
Also remove directories.
* daemon/Makefile.am (install-data-local, install-data-polkit)
(install-logrotate, install-sysconfig, install-sysctl)
(install-init-redhat, install-init-upstart, install-init-systemd)
(install-data-sasl): Use MKDIR_P.
(uninstall-data-polkit, uninstall-sysconfig, uninstall-sysctl)
(uninstall-init-redhat, uninstall-init-upstart)
(uninstall-init-systemd): Also remove directory.
(uninstall-logrotate): New rule.
(uninstall-local): Add uninstall-logrotate.

Make uninstall currently fails with the following message:

rmdir /etc/sasl2/
rmdir: failed to remove `/etc/sasl2/': Directory not empty

That's fine (correct in fact) so force the command to return success
with || :

This patch adds support for a systemd init service for libvirtd
and libvirt-guests. The libvirtd.service is *not* written to use
socket activation, since we want libvirtd to start on boot so it
can do guest auto-start.

The libvirt-guests.service is pretty lame, just exec'ing the
original init script for now. Ideally we would factor out the
functionality, into some shared tool.

Instead of

  ./configure --with-init-script=redhat

You can now do

  ./configure --with-init-script=systemd

Or better still:

  ./configure --with-init-script=systemd+redhat

We can also now support install of the upstart init script

* configure.ac: Add systemd, and systemd+redhat options to
  --with-init-script option
* daemon/Makefile.am: Install systemd services
* daemon/libvirtd.sysconf: Add note about unused env variable
  with systemd
* daemon/libvirtd.service.in: libvirtd systemd service unit
* libvirt.spec.in: Add scripts to installing systemd services
  and migrating from legacy init scripts
* tools/Makefile.am: Install systemd services
* tools/libvirt-guests.init.sh: Rename to tools/libvirt-guests.init.in
* tools/libvirt-guests.service.in: systemd service unit

As noted by Daniel Berrange [1], the proper fix for the older
PolicyKit build issue is to add virNetServerGetDBusConn to
libvirt_private.syms.  Revert unnecessary changes to
daemon/Makefile.am

[1] https://www.redhat.com/archives/libvir-list/2011-November/msg00852.html

I missed adding libvirt_driver_remote.la to libvirtd_LDADD in
commit b8adfcc6, which didn't cause a problem in 0.9.6 but
results in this build error in 0.9.7

libvirtd-remote.o: In function `remoteDispatchAuthPolkit':
remote.c:(.text+0x188dd): undefined reference to `virNetServerGetDBusConn'

The libvirtd daemon had a few crude system tap probes. Some of
these were broken during the RPC rewrite. The new modular RPC
code is structured in a way that allows much more effective
tracing. Instead of trying to hook up the original probes,
define a new set of probes for the RPC and event code.

The master probes file is now src/probes.d.  This contains
probes for virNetServerClientPtr, virNetClientPtr, virSocketPtr
virNetTLSContextPtr and virNetTLSSessionPtr modules. Also add
probes for the poll event loop.

The src/dtrace2systemtap.pl script can convert the probes.d
file into a libvirt_probes.stp file to make use from systemtap
much simpler.

The src/rpc/gensystemtap.pl script can generate a set of
systemtap functions for translating RPC enum values into
printable strings. This works for all RPC header enums (program,
type, status, procedure) and also the authentication enum

The PROBE macro will automatically generate a VIR_DEBUG
statement, so any place with a PROBE can remove any existing
manual DEBUG statements.

* daemon/libvirtd.stp, daemon/probes.d: Remove obsolete probing
* daemon/libvirtd.h: Remove probe macros
* daemon/Makefile.am: Remove all probe buildings/install
* daemon/remote.c: Update authentication probes
* src/dtrace2systemtap.pl, src/rpc/gensystemtap.pl: Scripts
  to generate STP files
* src/internal.h: Add probe macros
* src/probes.d: Master list of probes
* src/rpc/virnetclient.c, src/rpc/virnetserverclient.c,
  src/rpc/virnetsocket.c, src/rpc/virnettlscontext.c,
  src/util/event_poll.c: Insert probe points, removing any
  DEBUG statements that duplicate the info

To avoid static linking libvirtd to the RPC server code, which
then prevents sane introduction of DTrace probes, put it all
in the libvirt.so, and export it

* daemon/Makefile.am: Don't link to RPC libraries
* src/Makefile.am: Link all RPC libraries to libvirt.so
* src/libvirt_private.syms: Export all RPC functions

https://bugzilla.redhat.com/show_bug.cgi?id=740899 documents that
if qemu uses aio=native for its disks, then it consumes 128 aio
requests per disk.  On a host with multiple guests, this can quickly
run out of kernel aio requests with the default aio-max-nr of
65536.  Kernel developers have confirmed that there is no up-front
cost to raising this limit (a larger limit merely implies that more
aio requests can be issued in parallel, which in turn will result
in more kernel memory allocation, only if the system really does use
that many requests).  Since the system default limit prevents 256
disks, which is well within libvirt's current scalability, this
patch installs a file to raise the limit and document it in case a
system administrator has further cause to tune the limit.  The
install only works on platforms new enough to source /etc/sysctl.d/*
alongside /etc/sysctl.conf (F14 and RHEL 6).

* daemon/libvirtd.sysctl: New file.
* daemon/Makefile.am (EXTRA_DIST): Ship it.
(install-init, uninstall-init): Install it.
* libvirt.spec.in (%files): Include it in rpm.

Gettext annoyingly modifies CPPFLAGS in-place, putting
-I/usr/local/include into the search patch if libintl headers
must be used from that location.  But since we must support
automake 1.9.6 which lacks AM_CPPFLAGS, and since CPPFLAGS is used
prior to INCLUDES, this means that the build picks up the _old_
installed libvirt.h in priority to the in-tree version, leading
to all sorts of weird build failures on FreeBSD.

Fix this by teaching configure to undo gettext's actions, but
to keep any changes required by gettext at the end of INCLUDES
after all in-tree locations are used first.  Also requires
adding a wrapper Makefile.am and making gnulib-tool create
just gnulib.mk files during the bootstrap process.
Signed-off-by: NEric Blake <eblake@redhat.com>

I went with the shorter license notice used by src/libvirt.c,
rather than spelling out the full LGPLv2+ clause into each of
these files.

* configure.ac: Declare copyright.
* all Makefile.am: Likewise.

The only 'void name(void)' style procedure in the protocol is 'close' that
is handled special, but also programming errors like a missing _args or
_ret suffix on the structs in the .x files can create such a situation by
accident. Making the generator aware of this avoids bogus errors from the
generator such as:

  Use of uninitialized value in exists at ./rpc/gendispatch.pl line 967.

Also this allows to get rid of the -c option and the special case code for
the 'close' procedure, as the generator handles it now correctly.

Reported by Michal Privoznik

This guts the libvirtd daemon, removing all its networking and
RPC handling code. Instead it calls out to the new virServerPtr
APIs for all its RPC & networking work

As a fallout all libvirtd daemon error reporting now takes place
via the normal internal error reporting APIs. There is no need
to call separate error reporting APIs in RPC code, nor should
code use VIR_WARN/VIR_ERROR for reporting fatal problems anymore.

* daemon/qemu_dispatch_*.h, daemon/remote_dispatch_*.h: Remove
  old generated dispatcher code
* daemon/qemu_dispatch.h, daemon/remote_dispatch.h: New dispatch
  code
* daemon/dispatch.c, daemon/dispatch.h: Remove obsoleted code
* daemon/remote.c, daemon/remote.h: Rewrite for new dispatch
  APIs
* daemon/libvirtd.c, daemon/libvirtd.h: Remove all networking
  code
* daemon/stream.c, daemon/stream.h: Update for new APIs
* daemon/Makefile.am: Link to libvirt-net-rpc-server.la

Move the daemon/remote_generator.pl to src/rpc/gendispatch.pl
and move the src/remote/rpcgen_fix.pl to src/rpc/genprotocol.pl

* daemon/Makefile.am: Update for new name/location of generator
* src/Makefile.am: Update for new name/location of generator

* daemon/THREADING.txt: Rename...
* daemon/THREADS.txt: ...to match qemu thread notes.
* daemon/Makefile.am (EXTRA_DIST): Reflect rename.

Steps to reproduce this problem:
1. # ./autogen.sh --without-libvirtd
2. # make dist
   ...
   make[1]: Entering directory `/home/wency/source/libvirt-nodaemon/daemon'
   make[1]: *** No rule to make target `remote_dispatch_prototypes.h', needed by `distdir'.  Stop.
   make[1]: Leaving directory `/home/wency/source/libvirt-nodaemon/daemon'
   make: *** [distdir] Error 1

Steps to reproduce this problem:
1. # ./autogen.sh --without-libvirtd
2. # make dist
3. # rpmbuild --nodeps --define "_sourcedir `pwd`" -ba libvirt.spec
   ...
   make[2]: Entering directory `/home/wency/rpmbuild/BUILD/libvirt-0.9.1/daemon'
   make[2]: *** No rule to make target `probes.d', needed by `probes.h'.  Stop.
   make[2]: Leaving directory `/home/wency/rpmbuild/BUILD/libvirt-0.9.1/daemon'
   make[1]: *** [all-recursive] Error 1
   make[1]: Leaving directory `/home/wency/rpmbuild/BUILD/libvirt-0.9.1'
   make: *** [all] Error 2
   error: Bad exit status from /var/tmp/rpm-tmp.WkAD7a (%build)

glibc 2.13.90 has obsoleted its rpc implementation in favour of
the one provided by the TI-RPC library:

> * The RPC implementation in libc is obsoleted.  Old programs keep working
>   but new programs cannot be linked with the routines in libc anymore.
>   Programs in need of RPC functionality must be linked against TI-RPC.
>   The TI-RPC implemtation is IPv6 enabled and there are other benefits.
>
>   Visible changes of this change include (obviously) the inability to
>   link
>   programs using RPC functions without referencing the TI-RPC library,
>   the
>   removal of the RPC headers from the glibc headers, and the lack of
>   symbols defined in <rpc/netdb.h> when <netdb.h> is installed.
>   Implemented by Ulrich Drepper.
(from glibc NEWS)

Thus with recent glibc, we need to try linking with -ltirpc when looking
for the XDR functions. The daemon also needs to use XDR_CFLAGS to be able
to find the XDR headers stored in /usr/include/tirpc.

When using TI-RPC, there are some warnings about redundant declarations, but
the fix probably belongs in other modules:

/usr/include/tirpc/rpc/rpcent.h:68:13: warning: redundant redeclaration of
'setrpcent' [-Wredundant-decls]
/usr/include/rpc/netdb.h:53:13: note: previous declaration of 'setrpcent'
was here

/usr/include/tirpc/rpc/rpcent.h:69:13: warning: redundant redeclaration of
'endrpcent' [-Wredundant-decls]
/usr/include/rpc/netdb.h:54:13: note: previous declaration of 'endrpcent'
was here

/usr/include/tirpc/rpc/rpc.h:84:12: warning: redundant redeclaration of
'bindresvport' [-Wredundant-decls]
/usr/include/netinet/in.h:440:12: note: previous declaration of
'bindresvport' was here

* daemon/Makefile.am (DAEMON_GENERATED, remote_dispatch_*.h)
(qemu_dispatch_*.h): Update to live in srcdir, since they are
distributed.
Detected by Daniel P. Berrange's autobuilder.

Always generate the rpc files, and require rpcgen during bootstrap.

* daemon/Makefile.am: Removed generated files with
  maintainer-clean target
* src/Makefile.am: Removed generated files with
  maintainer-clean target. Always run 'rpcgen' if
  generated files are missing

In preparation for removing generated files, it is necessary
to tell automake that the generated files must be distributed
but not directly compiled (since they are included into the
body of a larger .c file that is compiled).  Hence, even though
these files are code and not headers in the strict sense of
the word, it is easier to rename them to .h for automake's sake.

* daemon/remote_client_bodies.c: Rename to .h.
* daemon/qemu_client_bodies.c: Likewise.
* src/remote/remote_client_bodies.c: Likewise.
* src/remote/qemu_client_bodies.c: Likewise.
* daemon/Makefile.am (remote_dispatch_bodies.c)
(qemu_dispatch_bodies.c): Rename to .h.
(remote.c, EXTRA_DIST): Reflect rename.
* daemon/remote.c: Likewise.
* daemon/remote_generator.pl: Likewise.
* src/Makefile.am (remote/remote_driver.c): Likewise.
* src/remote/remote_driver.c: Likewise.
* po/POTFILES.in: Likewise.
* cfg.mk (exclude_file_name_regexp--sc_require_config_h)
(exclude_file_name_regexp--sc_require_config_h_first)
(exclude_file_name_regexp--sc_prohibit_empty_lines_at_EOF):
Likewise.

This patch just covers the simple functions without explicit return
values. There is more to be handled.

The generator collects the members of the XDR argument structs and uses
this information to generate the function bodies.

Exclude the generated files from offending syntax-checks.

Suggested by Richard W.M. Jones

No functional change included, just a whitespace change.

To install it, disable libvirtd sysv initscript:
    chkconfig libvirtd off
    service libvirtd stop

and enable libvirtd upstart job:
    cp  /usr/share/doc/libvirt-*/libvirtd.upstart \
        /etc/init/libvirtd.conf
    initctl reload-configuration
    initctl start libvirtd

Test:
    initctl status libvirtd
libvirtd start/running, process 3929
    killall -9 libvirtd
    initctl status libvirtd
libvirtd start/running, process 4047

I looked into the possibility to use the upstart script from Ubuntu or
at least getting inspiration from it but that's not possible. "expect
daemon" is a nice thing but it only works if the process is defined with
exec stanza instead of script ... no script. Unfortunately, with exec
stanza environment variables can only be set within upstart script
(i.e., configuration in /etc/sysconfig/libvirtd can't work). Hence, we
need to use script stanza, source sysconfig, and execute libvirtd
without --daemon. For similar reasons we can't use limit stanza and need
to handle DAEMON_COREFILE_LIMIT in job's script.

The systemtap directory for tapsets is called

  /usr/share/systemtap/tapset

Not

 /usr/share/systemtap/tapsets

* daemon/Makefile.am,libvirt.spec.in: s/tapsets/tapset/

The Open Nebula driver has been unmaintained since it was first
introduced. The only commits have been for tree-wide cleanups.
It also has a major design flaw, in that it only knows about guests
that it has created itself, which makes it of very limited use.

Discussions wrt evolution of the VMWare ESX driver, concluded that
it should limit itself to single-node ESX operation and not try to
manage the multi-node architecture of VirtualCenter. Open Nebula
is a cluster like Virtual Center, not a single node system, so
the same reasoning applies.

The DeltaCloud project includes an Open Nebula driver and is a much
better fit architecturally, since it is explicitly targetting the
distributed multihost cluster scenario.

Thus this patch deletes the libvirt Open Nebula driver with the
recommendation that people use DeltaCloud for managing it instead.

* configure.ac: Remove probe for xmlrpc & --with-one arg
* daemon/Makefile.am, daemon/libvirtd.c, src/Makefile.am: Remove
  ONE driver build
* src/opennebula/one_client.c, src/opennebula/one_client.h,
  src/opennebula/one_conf.c, src/opennebula/one_conf.h,
  src/opennebula/one_driver.c, src/opennebula/one_driver.c: Delete
  files
* autobuild.sh, libvirt.spec.in, mingw32-libvirt.spec.in: Remove
  build rules for Open Nebula
* docs/drivers.html.in, docs/sitemap.html.in: Remove reference
  to OpenNebula
* docs/drvone.html.in: Delete file

Add a new xen driver based on libxenlight [1], which is the primary
toolstack starting with Xen 4.1.0.  The driver is stateful and runs
privileged only.

Like the existing xen-unified driver, the libxenlight driver is
accessed with xen:// URI.  Driver selection is based on the status
of xend.  If xend is running, the libxenlight driver will not load
and xen:// connections are handled by xen-unified.  If xend is not
running *and* the libxenlight driver is available, xen://
connections are deferred to the libxenlight driver.

V6:
 - Address several code style issues noted by Daniel Veillard
 - Make drive work with xen:/// URI
 - Hold domain object reference while domain is injected in
   libvirt event loop.  Race found and fixed by Markus Groß.

V5:
 - Ensure events are unregistered when domain private data
   is destroyed.  Discovered and fixed by Markus Groß.

V4:
 - Handle restart of libvirtd, reconnecting to previously
   started domains
 - Rebased to current master
 - Tested against Xen 4.1 RC7-pre (c/s 22961:c5d121fd35c0)

V3:
  - Reserve vnc port within driver when autoport=yes

V2:
  - Update to Xen 4.1 RC6-pre (c/s 22940:5a4710640f81)
  - Rebased to current master
  - Plug memory leaks found by Stefano Stabellini and valgrind
  - Handle SHUTDOWN_crash domain death event

[1] http://lists.xensource.com/archives/html/xen-devel/2009-11/msg00436.html

When building libvirt without libvirtd, I receive the following errors:
make[1]: Leaving directory `/home/wency/source/test/libvirt/src'
 (cd daemon && make  top_distdir=../libvirt-0.8.8 distdir=../libvirt-0.8.8/daemon \
     am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)
make[1]: Entering directory `/home/wency/source/test/libvirt/daemon'
make[1]: *** No rule to make target `libvirtd.8.in', needed by `distdir'.  Stop.

This bug was caused by commit 6db98a2d.
Signed-off-by: NWen Congyang <wency@cn.fujitsu.com>
Signed-off-by: NEric Blake <eblake@redhat.com>

The event loop implementation is used by more than just the
daemon, so move it into the shared area.

* daemon/event.c, src/util/event_poll.c: Renamed
* daemon/event.h, src/util/event_poll.h: Renamed
* tools/Makefile.am, tools/console.c, tools/virsh.c: Update
  to use new virEventPoll APIs
* daemon/mdns.c, daemon/mdns.c, daemon/Makefile.am: Update
  to use new virEventPoll APIs

As the file may grow quite a bit especially with debug turned on.
* daemon/libvirtd.logrotate.in daemon/Makefile.am libvirt.spec.in:
  add new logrotate file for the daemon log

Right now, 'man libvirtd' includes information that depends on
configure results, so it must be generated on the fly and live
in $(builddir); however, requiring pod2man on all end user
machines is overkill.  Meanwhile, 'man virsh' doesn't mention
any configure results, so it can be built at 'make dist' time.
If that situation changes in the future, we can generate virsh.1
in the same way that we generate libvirtd.8.

* daemon/Makefile.am (libvirtd.8.in): New rule, to run pod2man in
advance of distribution.
(libvirtd.8): Use only sed from tarball.
(EXTRA_DIST): Ship new file.
(libvirtd.pod): Delete unused rule.
(man8_MANS): Let automake know which section to use.
(CLEANFILES, MAINTAINERCLEANFILES): Adjust to new files.
* tools/Makefile.am (dist_man1_MANS): Distribute pre-built man
pages, fine since they don't require any substitution.
(virt-xml-validate.1, virt-pki-validate.1): Change input source.
(virsh.1): Build into srcdir.
(CLEANFILES, MAINTAINERCLEANFILES): Adjust to new build style.
* daemon/.gitignore: Update.
Reported by Diego Elio Pettenò.

Fixes test failure that was overlooked after commit 1e1f7a89.

* daemon/Makefile.am (check-local): Let 'make check' fail on error.
* daemon/test_libvirtd.aug: Move qemu-specific option...
* src/qemu/test_libvirtd_qemu.aug: ...into correct test.
* src/qemu/libvirtd_qemu.aug: Parse new option.

* daemon/Makefile.am: Avoid spurious space before tabs.
* src/Makefile.am: Likewise.
* examples/dominfo/Makefile.am: Likewise.
* examples/domsuspend/Makefile.am: Likewise.
* tools/Makefile.am: Likewise.
* src/datatypes.h (VIR_CONNECT_MAGIC): Likewise.
* src/internal.h (TODO): Likewise.
* src/qemu/qemu_monitor.h (QEMU_MONITOR_MIGRATE): Likewise.
* src/xen/xen_hypervisor.c (XEN_V2_OP_GETAVAILHEAP): Likewise.
* src/xen/xs_internal.h: Likewise.

* bootstrap.conf (gnulib_modules): Add configmake.
* daemon/Makefile.am (libvirtd_CFLAGS): Drop defines provided by
gnulib.
* src/Makefile.am (INCLUDES): Likewise.
* tests/Makefile.am (INCLUDES): Likewise.
* tools/Makefile.am (virsh_CFLAGS): Likewise.
* daemon/libvirtd.c (qemudInitPaths, usage, main): Update
clients.
* src/cpu/cpu_map.c (CPUMAPFILE): Likewise.
* src/driver.c (DEFAULT_DRIVER_DIR): Likewise.
* src/internal.h (_): Likewise.
* src/libvirt.c (virInitialize): Likewise.
* src/lxc/lxc_conf.h (LXC_CONFIG_DIR, LXC_STATE_DIR, LXC_LOG_DIR):
Likewise.
* src/lxc/lxc_conf.c (lxcCapsInit, lxcLoadDriverConfig):
Likewise.
* src/network/bridge_driver.c (NETWORK_PID_DIR)
(NETWORK_STATE_DIR, DNSMASQ_STATE_DIR, networkStartup): Likewise.
* src/nwfilter/nwfilter_driver.c (nwfilterDriverStartup):
Likewise.
* src/qemu/qemu_conf.c (qemudLoadDriverConfig): Likewise.
* src/qemu/qemu_driver.c (qemudStartup): Likewise.
* src/remote/remote_driver.h (LIBVIRTD_PRIV_UNIX_SOCKET)
(LIBVIRTD_PRIV_UNIX_SOCKET_RO, LIBVIRTD_CONFIGURATION_FILE)
(LIBVIRT_PKI_DIR): Likewise.
* src/secret/secret_driver.c (secretDriverStartup): Likewise.
* src/security/security_apparmor.c (VIRT_AA_HELPER): Likewise.
* src/security/virt-aa-helper.c (main): Likewise.
* src/storage/storage_backend_disk.c (PARTHELPER): Likewise.
* src/storage/storage_driver.c (storageDriverStartup): Likewise.
* src/uml/uml_driver.c (TEMPDIR, umlStartup): Likewise.
* src/util/hooks.c (LIBVIRT_HOOK_DIR): Likewise.
* tools/virsh.c (main): Likewise.
* docs/hooks.html.in: Likewise.

The previous commit, 880da47a,
worked on my system, but wasn't actually correct.  This follow
up patch corrects it properly.

This 1-liner was actually written by Eric Blake, over IRC. It
addresses a compilation failure in make dist and make rpm for
systems without the dtrace/systemtap development libraries
installed.

Adds initial support for dtrace static probes in libvirtd
daemon, assuming use of systemtap dtrace compat shim on
Linux. The probes are inserted for network client connect,
disconnect, TLS handshake states and authentication protocol
states.

This can be tested by running the xample program and then
attempting to connect with any libvirt client (virsh,
virt-manager, etc).

 # stap examples/systemtap/client.stp
  Client fd=44 connected readonly=0
  Client fd=44 auth polkit deny pid:24997,uid:500
  Client fd=44 disconnected
  Client fd=46 connected readonly=1
  Client fd=46 auth sasl allow test
  Client fd=46 disconnected

The libvirtd.stp file should also really not be required,
since it is duplicated info that is already available in
the main probes.d definition file. A script to autogenerate
the .stp file is needed, either in libvirtd tree, or better
as part of systemtap itself.

* Makefile.am: Add examples/systemtap subdir
* autobuild.sh: Disable dtrace for mingw32
* configure.ac: Add check for dtrace
* daemon/.gitignore: Ignore generated dtrace probe file
* daemon/Makefile.am: Build dtrace probe header & object
  files
* daemon/libvirtd.stp: SystemTAP convenience probeset
* daemon/libvirtd.c: Add connect/disconnect & TLS probes
* daemon/remote.c: Add SASL and PolicyKit auth probes
* daemon/probes.d: Master probe definition
* daemon/libvirtd.h: Add convenience macro for probes
  so that compilation is a no-op when dtrace is not available
* examples/systemtap/Makefile.am, examples/systemtap/client.stp
  Example systemtap script using dtrace probe markers
* libvirt.spec.in: Enable dtrace on F13/RHEL6
* mingw32-libvirt.spec.in: Force disable dtrace