Fix compile error on opensuse 12.2 with systemd 44 and glibc-2.15.

The specific systemd/glibc version do not include syslog.h by default.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=73455
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Don't forget allow_anonymous when merging configs

The algorithm to collapse a subsidiary config file's data into the
master data structure forgot to examine this flag.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=73475
Reviewed-by: Chengwei Yang <chengwei.yang@intel.com>
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
NEWS
CMake warning--.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=41252
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Correct test for LIBTOOLIZE by quoting it

Based on a patch from Roland <blueburn85 gmail com>.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=73278