The xenstore database sometimes has stale domain IDs which are not
present in the hypervisor anymore. Filter these out to avoid causing
confusion

* src/xen/xs_internal.c: Filter domain IDs against HV's list
* src/xen/xen_hypervisor.h, src/xen/xen_hypervisor.c: Add new
  xenHypervisorHasDomain() method for checking ID validity

- Don't duplicate SystemError
- Use proper error code in domain_conf
- Fix a broken error call in qemu_conf
- Don't use VIR_ERR_ERROR in security driver (isn't a valid code in this case)

Add the virStrncpy function, which takes a dst string, source string,
the number of bytes to copy and the number of bytes available in the
dest string.  If the source string is too large to fit into the
destination string, including the \0 byte, then no data is copied and
the function returns NULL.  Otherwise, this function copies n bytes
from source into dst, including the \0, and returns a pointer to the
dst string.  This function is intended to replace all unsafe uses
of strncpy in the code base, since strncpy does *not* guarantee that
the buffer terminates with a \0.
Signed-off-by: NChris Lalancette <clalance@redhat.com>

* src/Makefile.am, src/proxy_internal.c, src/proxy_internal.h
  src/sexpr.c, src/sexpr.h, src/xen_unified.c, src/xen_unified.h,
  src/xen_internal.c, src/xen_internal.h, src/xen_inotify.c,
  src/xen_inotify.h, src/xend_internal.c, src/xend_internal.h,
  src/xm_internal.c, src/xm_internal.h, src/xs_internal.c,
  src/xs_internal.h: Move to src/xen/ directory
* proxy/Makefile.am, proxy/libvirt_proxy.c, src/Makefile.am,
  src/libvirt.c, tests/sexpr2xmltest.c, tests/statstest.c,
  tests/xencapstest.c, tests/xmconfigtest.c, tests/xml2sexprtest.c:
  Adapt to changed xen location
* src/stats_linux.h, src/stats_linux.c: Remove xen specific block
  stats APIs
* src/qemu_driver.c, src/uml_driver.c: Add missing sys/un.h include
  uncovered after change to stats_linux.h
* src/xen/block_stats.h, src/xen/block_stats.c: Add xen specific
  block stats APIs

* src/xen_internal.c (xenHypervisorSetSchedulerParameters): Remove
set-but-never-used local variables, cap_set and weight_set.

Signed-off-by: NChris Lalancette <clalance@redhat.com>

* src/xen_internal.c: Don't free memory now owned by the virCapsPtr
   structure
* tests/testutilsxen.c: Fix up for change in internal API

A subsequent commit will add a "canonical" field to this structure,
this patch basically just prepares the way for that.

The new type is added, along with virCapabilitiesAlloc/FreeMachines()
helpers and a whole bunch of code to make the transition.

One quirk is that virCapabilitiesAddGuestDomain() and
virCapabilitiesAddGuest() take ownership of the machine list rather
than duping it. This makes sense to avoid needless copying.

* src/capabilities.h: add the virCapsGuestMachine struct and use it
  in virCapsGuestDomainInfo, add prototypes for new functions and
  update the AddGuest() prototypes

* src/capabilities.c: add code for allocating and freeing the new
  type, change the machines parameter to AddGuest() etc.

* src/libvirt_private.syms: export the new helpers

* src/qemu_conf.c: update all the machine type code to use the new
  struct

* src/xen_internal.c: ditto

* tests/testutilsqemu.c: ditto

built-in TODO list for each driver.  Also rip out the internal getURI method;
it is never used by any of the drivers, and was buggy to boot.

* qemud/qemud.c (GET_CONF_STR): Use virStrerror, not strerror.
* qemud/remote.c (remoteDispatchDomainBlockPeek): Likewise.
(remoteDispatchDomainMemoryPeek, remoteDispatchAuthSaslInit): Likewise.
(remoteDispatchAuthPolkit): Likewise.
* src/lxc_container.c (lxcContainerAvailable): Likewise.
* src/network_driver.c (networkStartNetworkDaemon): Likewise.
(networkShutdownNetworkDaemon): Likewise.
* src/qemu_conf.c (qemudExtractVersion, qemudNetworkIfaceConnect):
* src/storage_conf.c (virStoragePoolLoadAllConfigs): Likewise.
* src/storage_driver.c (storagePoolUndefine): Likewise.
* src/uml_driver.c (umlStartup, umlStartVMDaemon): Likewise.
* src/util.c (virFileReadAll): Likewise.
* src/uuid.c (virUUIDGenerate): Likewise.
* src/xen_internal.c (get_cpu_flags): Likewise.

* Makefile.cfg (local-checks-to-skip): Remove sc_redundant_const.
* src/lxc_controller.c: Remove redundant "const"(s).
* src/storage_backend_fs.c: Likewise.
* src/util.h: Likewise.
* src/xen_internal.c: Likewise.
* tests/qparamtest.c: Likewise.

* src/uml_conf.c (VIR_FROM_THIS): Define to VIR_FROM_UML.
* src/xs_internal.c (VIR_FROM_THIS): Define to VIR_FROM_XEN.
* src/xml.c (VIR_FROM_THIS): Define to VIR_FROM_XML.
* src/stats_linux.c (VIR_FROM_THIS): Define to VIR_FROM_STATS_LINUX.
* src/datatypes.c (VIR_FROM_THIS): Define to VIR_FROM_NONE.
* src/lxc_conf.c (VIR_FROM_THIS): Define to VIR_FROM_LXC.
* src/libvirt.c (VIR_FROM_THIS): Define to VIR_FROM_NONE.
* src/node_device_conf.c (VIR_FROM_THIS): Define to VIR_FROM_NODEDEV.
* src/openvz_conf.c (VIR_FROM_THIS): Define to VIR_FROM_OPENVZ.
* src/openvz_driver.c (VIR_FROM_THIS): Define to VIR_FROM_OPENVZ.
* src/conf.c (VIR_FROM_THIS): Define to VIR_FROM_CONF.
Note: this loses config_filename:config_lineno diagnostics,
but that's ok.
* src/node_device.c (VIR_FROM_THIS): Define to VIR_FROM_NODEDEV.
* src/sexpr.c (VIR_FROM_THIS): Define to VIR_FROM_SEXPR.
* po/POTFILES.in: remove src/sexpr.c and src/lxc_conf.c

  for RHEL-5 and change the detection stategy for default Xen
  accesses, patch by Markus Armbruster
daniel

* src/logging.c src/logging.h proxy/Makefile.am proxy/libvirt_proxy.c
  src/Makefile.am src/cgroup.c src/datatypes.c src/domain_event.c
  src/internal.h src/libvirt.c src/lxc_container.c src/lxc_controller.c
  src/lxc_driver.c src/proxy_internal.c src/qemu_driver.c
  src/remote_internal.c src/storage_backend_disk.c src/util.c
  src/veth.c src/xen_internal.c src/xen_unified.c src/xend_internal.c:
  add new logging module, and move existing definitions there
Daniel

* tests/nodeinfotest.c: Include "util.h".
* src/xen_internal.c: Likewise.
* src/qemu_conf.c (qemudCapsInit): Use ARRAY_CARDINALITY.
* src/storage_backend.c (virStorageBackendForType): Likewise.
* src/storage_backend_fs.c (virStorageBackendProbeFile): Likewise.
* src/xen_internal.c (xenHypervisorMakeCapabilitiesInternal): Likewise.
* src/xend_internal.c (xenDaemonParseSxpr): Likewise.
* tests/nodeinfotest.c (mymain): Likewise.
* tests/qparamtest.c (DO_TEST): Likewise.

* include/libvirt/libvirt.h[.in] include/libvirt/virterror.h
  qemud/remote* src/driver.h src/libvirt.c src/libvirt_sym.version
  src/lxc_driver.c src/openvz_driver.c src/proxy_internal.c
  src/qemu_driver.c src/remote_internal.c src/test.c src/virsh.c
  src/xen_internal.c src/xen_unified.c src/xen_unified.h
  src/xend_internal.c src/xend_internal.h src/xm_internal.c
  src/xs_internal.c docs/*: cleanup virDomainCreateLinux into
  virDomainDefineXML, and a few additional cleanups
Daniel

* src/xen_internal.c src/xend_internal.c: fix a couple of issues
  for List functions where max given is 0
Daniel