Overview of changes from GLib 2.29.18 to 2.29.90
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* API/ABI changes:
 - unix signal watches now match the API of all of the other sources
 - revert the addition of g_date_time_source_new () from last release

* networking and other fixes for Solaris
 - we no longer support symbolic port names (ie: from /etc/services)
 - check if -lsocket is needed
 - fix g_socket_details_from_fd()
 - avoid getmntinfo
 - fix some harmless warnings

* GDateTime improvements:
 - generally improved standards compliance (with C99)
 - support C99-specified format strings: %g, %G, %V, %c, %C, %w
 - consult the locale for the preferred 12-hour time format (%r)
 - drop support for non-standard %N and broken %W
 - better support for formatting non-POSIX (eg: Arabic) numerals
 - locale-related test case fixups, and fix some leaks

* GTlsInteraction: add interaction method invocation guarantees

* gdbus-codegen: post-process all interfaces when parsing >1 file

* make GMainLoop, GMainContext and GSource boxed types

* fix a race condition in the first use of g_get_monotonic_time()

* lots gtk-doc cleanups

* better intltool compatibility when generating pot file

* avoid GCC-specific compiler options when not using GCC

* Translation updates:
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