gsettings test: fix srcdir != builddir

Just copy the schemas to the builddir and compile them in place instead
of trying to mess around with creating the compiled file in a different
dir.  This solves issues in the summary/description testcase when
GSettings expects the usual situation of having the .xml files present
in the same directory.
Revert "gdbus-connection-loss: Fix leak in test"

This reverts commit 670379b26f4a86c7b51b928eb0332b9a654e4c4c.

This is causing distcheck to fail and will have to be revisited later.
GLib 2.39.1
bump version
gdesktopappinfo: Rank Keywords matches higher than GenericName

It makes sense to match on GenericName in case an application does
not provide any keywords, but the Keywords field has been added
to explicitly support the search case, while GenericName was used
to be displayed in menus, so it makes more sense to consider
Keywords more (or equally) relevant for search.

https://bugzilla.gnome.org/show_bug.cgi?id=711640
gstrfuncs: Mention nullability in g_ascii_strcasecmp() documentation

Like strcmp(), g_ascii_strcasecmp() requires that both of its parameters
be non-%NULL.
Fix GSettings testcase again

Hopefully this one will work for both srcdir == builddir and not.
gobject: Box GMappedFile

GMappedFile is current unintrospectable, because it's not a registered
box type.  It already has reference counting functions, so there's
little reason not to box it.

This commit adds GMappedFile to the hoard of other boxes types handled
by gboxed.c

https://bugzilla.gnome.org/show_bug.cgi?id=712393
GDummyTlsBackend: cache the GDummyTlsDatabase

The default GTlsDatabase is supposed to be a singleton (and libsoup
has tests that will fail if it's not).
gsettings.m4: @GSETTINGS_RULES@: Support srcdir != builddir with nonrecursive make

In hotssh I use nonrecursive make.  gnome-continuous uses srcdir !=
builddir by default.  @GSETTINGS_RULES@ will then attempt to touch a
nonexistent path.

This patch fixes that.

https://bugzilla.gnome.org/show_bug.cgi?id=712171
Use AC_HEADER_MAJOR

Instead of checking for sys/mkdev.h headerfile, there is the
AC_HEADER_MAJOR helper for how to get major(), minor(), makedev().

https://bugzilla.gnome.org/show_bug.cgi?id=712314
AIX splice() is something different

AIX does provide the splice() symbol, but this does have different
signature and usecase than what Linux may provide.

https://bugzilla.gnome.org/show_bug.cgi?id=712314
GSocketClient: For _CONNECTING event, make remote address accessible

My application (hotssh) would like to get the resolved address from DNS,
before we start the connect().

We could add a new event, but it's easy enough to just cache it on the
GSocketConnection; this avoids any new API.

https://bugzilla.gnome.org/show_bug.cgi?id=712547
gmessages: Add g_info macro for G_LOG_LEVEL_INFO

For completeness. Although less used than others, projects want
to use this, and end up having to define it awkwardly themselves.

https://bugzilla.gnome.org/show_bug.cgi?id=711103
build: Give internal libraries higher precedence

Linking local libraries too late may cause preinstalled libraries to
get found earlier, due to external library paths in .la files.

https://bugzilla.gnome.org/show_bug.cgi?id=712314
gbacktrace: Print out gdb exec errors correctly

We want to see error messages related to starting and running
gdb (such as if it's not installed).

https://bugzilla.gnome.org/show_bug.cgi?id=711088
Remove alleged support for OS/2

In particular, remove the OS/2 GModule implementation (which AFAICT
was never actually built even on OS/2).

https://bugzilla.gnome.org/show_bug.cgi?id=710519
Remove alleged support for BeOS

Since the initial addition of BeOS support in 1999, there has only
been one update to it (in 2005, and it wasn't even very big). GLib is
known to not currently build on Haiku (or presumably actual BeOS)
without additional patching, and the fact that there isn't a single
G_OS_BEOS check in gio/ is suspicious.

Additionally, other than the GModule implementation, all of the
existing G_OS_BEOS checks are either (a) "G_OS_UNIX || G_OS_BEOS", or
(b) random minor POSIXy tweaks (include this header file rather than
that one, etc), suggesting that if we were going to support Haiku, it
would probably be simpler to treat it as a special kind of G_OS_UNIX
(as we do with Mac OS X) rather than as its own completely different
thing.

So, kill G_OS_BEOS.

https://bugzilla.gnome.org/show_bug.cgi?id=710519
Remove alleged support for last-millennium Unixes

Remove workarounds for NeXTStep (last released in 1995), SunOS (1994),
HP-UX 9.x (1992) and 10.x (1995), OSF/1 / Digital UNIX / Tru64 UNIX
4.x (1999), and AIX 4.x (1999).

HP-UX 11 implements dlopen(), so dropping support for earlier versions
also lets us remove the HP-UX-specific gmodule-dld.

https://bugzilla.gnome.org/show_bug.cgi?id=710519
Require C90 compliance

Assume all supported platforms implement C90, and therefore they
(correctly) implement atexit(), memmove(), setlocale(), strerror(),
and vprintf(), and have <float.h> and <limits.h>.

(Also remove the configure check testing that "do ... while (0)" works
correctly; the non-do/while-based version of G_STMT_START and
G_STMT_END was removed years ago, but the check remained. Also, remove
some checks that configure.ac claimed were needed for libcharset, but
aren't actually used.)

Note that removing the g_memmove() function is not an ABI break even
on systems where g_memmove() was previously not a macro, because it
was never marked GLIB_AVAILABLE_IN_ALL or listed in glib.symbols, so
it would have been glib-internal since 2004.

https://bugzilla.gnome.org/show_bug.cgi?id=710519