* tests/.gitignore: Sort, and add sockettest.

The current code will go into an infinite loop if the printf generated
string is >= 1000, AND exactly 1 character smaller than the amount of free
space in the buffer. When this happens, we are dropped into the loop body,
but nothing will actually change, because count == (buf->size - buf->use - 1),
and virBufferGrow returns unchanged if count < (buf->size - buf->use)

Fix this by removing the '- 1' bit from 'size'. The *nprintf functions handle
the NULL byte for us anyways, so we shouldn't need to manually accommodate
for it.

Here's a bug where we are actually hitting this issue:
https://bugzilla.redhat.com/show_bug.cgi?id=602772

v2: Eric's improvements: while -> if (), remove extra va_list variable,
    make sure we report buffer error if snprintf fails

v3: Add tests/virbuftest which reproduces the infinite loop before this
    patch, works correctly after

'./autobuild.sh' with lcov installed discovered that our
coverage support has been bit-rotting for a while.  This
restores it back to a successful state, although I have
not yet spent any time looking through the resulting files to
look for low-hanging fruit in the unit test coverage front.

* configure.ac: Clear COMPILER_FLAGS at right place.
* Makefile.am (cov): Newer genhtml no longer likes plain -s.
* m4/compiler-flags.m4 (gl_COMPILER_FLAGS): Don't AC_SUBST
COMPILER_FLAGS; it is a shell variable for use in configure only.
* src/Makefile.am (AM_CFLAGS, AM_LDFLAGS): New variables, to make
it easier to provide global flag additions.  Use throughout, to
uniformly apply coverage flags.
* .gitignore: Globally ignore gcov output.
* daemon/.gitignore: Simplify.
* src/.gitignore: Likewise.
* tests/.gitignore: Likewise.

Move existing schema data to an input directory. Add extra files for more
thorough XML testing.

* tests/.gitignore: ignore new test binaries
* tests/Makefile.am: add new tests
* tests/esxutilstest.c: test esxVMX_IndexToDiskName()
* tests/vmx2xmldata/*: config files for the VMX to domain XML test
* tests/vmx2xmltest.c: test the VMX to domain XML mapping
* tests/xml2vmxdata/*: config files for the domain XML to VMX test
* tests/xml2vmxtest.c: test the domain XML to VMX mapping

* tests/interfaceschematest: test all XML data against the interface
  schemas
* tests/interfacexml2xmltest.c: parse and reserialize all XML data
  and check the output is identical
* tests/Makefile.am: hook up the tests
* tests/.gitignore: add ignore test

Add a test to check node device XML parsing by first parsing
the XML, then re-formatting as XML and finally comparing the
resulting XML to the original XML.

* bootstrap (modules): Add time_r.
* gnulib/m4/time_h.m4: New file.
* gnulib/m4/time_r.m4: New file.
* gnulib/lib/time_r.c: New file.
* gnulib/tests/test-time.c: New file.
* gnulib/lib/time.in.h: New file.
* gnulib/lib/Makefile.am: Update.
* gnulib/lib/fseeko.c: Likewise.
* gnulib/lib/lstat.c: Likewise.
* gnulib/lib/netdb.in.h: Likewise.
* gnulib/lib/stdint.in.h: Likewise.
* gnulib/lib/stdlib.in.h: Likewise.
* gnulib/lib/sys_select.in.h: Likewise.
* gnulib/lib/sys_stat.in.h: Likewise.
* gnulib/lib/sys_time.in.h: Likewise.
* gnulib/lib/unistd.in.h: Likewise.
* gnulib/lib/wchar.in.h: Likewise.
* gnulib/m4/codeset.m4: Likewise.
* gnulib/m4/errno_h.m4: Likewise.
* gnulib/m4/extensions.m4: Likewise.
* gnulib/m4/getaddrinfo.m4: Likewise.
* gnulib/m4/gettext.m4: Likewise.
* gnulib/m4/glibc2.m4: Likewise.
* gnulib/m4/glibc21.m4: Likewise.
* gnulib/m4/gnulib-cache.m4: Likewise.
* gnulib/m4/gnulib-comp.m4: Likewise.
* gnulib/m4/iconv.m4: Likewise.
* gnulib/m4/include_next.m4: Likewise.
* gnulib/m4/intdiv0.m4: Likewise.
* gnulib/m4/intlmacosx.m4: Likewise.
* gnulib/m4/intmax.m4: Likewise.
* gnulib/m4/inttypes-pri.m4: Likewise.
* gnulib/m4/inttypes_h.m4: Likewise.
* gnulib/m4/lcmessage.m4: Likewise.
* gnulib/m4/lib-link.m4: Likewise.
* gnulib/m4/lstat.m4: Likewise.
* gnulib/m4/netdb_h.m4: Likewise.
* gnulib/m4/nls.m4: Likewise.
* gnulib/m4/po.m4: Likewise.
* gnulib/m4/printf-posix.m4: Likewise.
* gnulib/m4/printf.m4: Likewise.
* gnulib/m4/progtest.m4: Likewise.
* gnulib/m4/size_max.m4: Likewise.
* gnulib/m4/sockets.m4: Likewise.
* gnulib/m4/stdint.m4: Likewise.
* gnulib/m4/stdint_h.m4: Likewise.
* gnulib/m4/sys_ioctl_h.m4: Likewise.
* gnulib/m4/threadlib.m4: Likewise.
* gnulib/m4/uintmax_t.m4: Likewise.
* gnulib/m4/visibility.m4: Likewise.
* gnulib/m4/wchar.m4: Likewise.
* gnulib/m4/wchar_t.m4: Likewise.
* gnulib/m4/wint_t.m4: Likewise.
* gnulib/m4/xsize.m4: Likewise.
* gnulib/tests/Makefile.am: Likewise.
* gnulib/tests/sockets.h: Likewise.
* gnulib/tests/.cvsignore: Likewise.
* gnulib/tests/.gitignore: Likewise.
* tests/.gitignore: Likewise.
* docs/examples/.gitignore: Likewise.
* gnulib/lib/.cvsignore: Likewise.
* gnulib/lib/.gitignore: Likewise.

remove files associated with obsolete strpbrk module
* gnulib/lib/strpbrk.c: Remove file.
* gnulib/m4/strpbrk.m4: Remove file.

* Makefile.maint (sync-vcs-ignore-files): New target.
Prompted by a patch from James Morris.
http://thread.gmane.org/gmane.comp.emulators.libvirt/8619/focus=8773
Add all (now-generated) .gitignore files.
* .gitignore: New file.
* build-aux/.gitignore: New file.
* docs/.gitignore: New file.
* docs/devhelp/.gitignore: New file.
* docs/examples/.gitignore: New file.
* docs/examples/python/.gitignore: New file.
* gnulib/lib/.gitignore: New file.
* gnulib/lib/arpa/.gitignore: New file.
* gnulib/lib/netinet/.gitignore: New file.
* gnulib/lib/sys/.gitignore: New file.
* gnulib/tests/.gitignore: New file.
* include/.gitignore: New file.
* include/libvirt/.gitignore: New file.
* po/.gitignore: New file.
* proxy/.gitignore: New file.
* python/.gitignore: New file.
* python/tests/.gitignore: New file.
* qemud/.gitignore: New file.
* src/.gitignore: New file.
* tests/.gitignore: New file.
* tests/confdata/.gitignore: New file.
* tests/sexpr2xmldata/.gitignore: New file.
* tests/virshdata/.gitignore: New file.
* tests/xencapsdata/.gitignore: New file.
* tests/xmconfigdata/.gitignore: New file.
* tests/xml2sexprdata/.gitignore: New file.

	* src/test.c, src/libvirt.c, src/virterror.c,
	  include/libvirt/virterror.h: Add a VIR_FROM_TEST error class
	  and ensure that test driver errors are from this class.
	  Tidy up the error messages generated by the test driver when
	  user doesn't add a path to the URL and avoid open ("/").