Commit 5d4b0c4c tried to fix certain classes of VPATH builds,
but was too limited.  In particular, Guannan Ren reported:

>    For example: The libvirt source code resides in /home/testuser,
>                 I make dist in /tmp/buildvpath, the XDR routine .c file will
>                 include full path of the header file like:
>
>                 #include "/home/testuser/src/rpc/virnetprotocol.h"
>                 #include "internal.h"
>                 #include <arpa/inet.h>
>
>    If we distribute the tarball to another machine to compile,
>    it will report error as follows:
>
>    rpc/virnetprotocol.c:7:59: fatal error:
>    /home/testuser/src/rpc/virnetprotocol.h: No such file or directory

* src/rpc/genprotocol.pl: Fix more include lines.

The RPC code had several latent memory leaks and an attempt to
free the wrong string, but thankfully nothing triggered them
(blkiotune was the only one returning a string, and always as
the last parameter).  Also, our cleanups for rpcgen ended up
nuking a line of code that renders VIR_TYPED_PARAM_INT broken,
because it was the only use of 'i' in a function, even though
it was a member usage rather than a standalone declaration.

* daemon/remote.c (remoteSerializeTypedParameters): Free the
correct array element.
(remoteDispatchDomainGetSchedulerParameters)
(remoteDispatchDomainGetSchedulerParametersFlags)
(remoteDispatchDomainBlockStatsFlags)
(remoteDispatchDomainGetMemoryParameters): Don't leak strings.
* src/rpc/genprotocol.pl: Don't nuke member-usage of 'buf' or 'i'.

The RPC fixups needed on Linux are also needed on cygwin, and
worked without further tweaking to the list of fixups.  Also,
unlike BSD, Cygwin exports 'struct ifreq', but unlike Linux,
Cygwin lacks the ioctls that we were using 'struct ifreq' to
access.  This patch allows compilation under cygwin.

* src/rpc/genprotocol.pl: Also perform fixups on cygwin.
* src/util/virnetdev.c (HAVE_STRUCT_IFREQ): Also require AF_PACKET
definition.
* src/util/virnetdevbridge.c (virNetDevSetupControlFull): Only
compile if SIOCBRADDBR works.

I ran into the following build failure:
$ mkdir -p build1 build2/a/very/deep/hierarcy
$ cd build2/a/very/deep/hierarcy
$ ../../../../../configure && make
$ cd ../../../../build1
$ ../configure && make
...
../../src/remote/remote_protocol.c:7:55: fatal error: ../../../../../src/remote/remote_protocol.h: No such file or directory

Turns out that we were sometimes generating the remote_protocol.c
file with information from the VPATH build, which is bad, since
any file shipped in the tarball should be idempotent no matter how
deep the VPATH build tree that created it.

* src/rpc/genprotocol.pl: Don't embed VPATH into generated file.

These typos are introduced by file renaming in commit b17b4afa.

src/remote/qemu_protocol.x \
src/remote/remote_protocol.x \
src/rpc/gendispatch.pl:
    s/remote_generator/gendispatch/

src/rpc/genprotocol.pl:
    s/remote\/remote_protocol/remote_protocol/

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

* src/remote/rpcgen_fix.pl: Add executable bit.
* tests/oomtrace.pl: Likewise.

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

Cygwin's XDR implementation defines xdr_u_int64_t instead of
xdr_uint64_t and lacks IXDR_PUT_INT32/IXDR_GET_INT32.

Alter the IXDR_GET_LONG regex in rpcgen_fix.pl so it doesn't destroy
the #define IXDR_GET_INT32 IXDR_GET_LONG in remote_protocol.x.

Also fix the remote_protocol.h regex in rpcgen_fix.pl.

When making changes to the remote protocol, src/ is always built
first, so rpcgen should live there, to avoid having to run make
in the 'daemon/' directory before building src/

* src/Makefile.am: Add rules for rpcgen, and drop -I../daemon from
  remote client build
* daemon/Makefile.am: Add -I../src/remote/ to libvirtd build
  and remove rpcgen rules
* daemon/libvirtd.c: Adapt include of remote_driver.h taking
  into account new -I flag
* daemon/remote_protocol.c, daemon/remote_protocol.h,
  daemon/remote_protocol.x: Move to src/remote/
* daemon/rpcgen_fix.pl: Move to src/remote/rpcgen_fix.pl

* qemud/: Rename to daemon/
* Makefile.am, configure.in, src/Makefile.am, src/remote_internal.c,
  tests/Makefile.am, tests/eventtest.c: s/qemud/daemon/ where needed

	* qemud/rpcgen_fix.pl: Case-insensitive string match on identifiers.
	* qemud/remote_protocol.c: Update this generated file.

	* qemud/remote_protocol.x qemud/rpcgen_fix.pl
	  qemud/remote_protocol.c qemud/remote_protocol.h: Client/server
	  protocol used by remote.