Log Message:
Update to 1.6.0:

Changes since libX11 1.5 (found in the release candidates) include fixes
for the recently announced security issues CVE-2013-1981, CVE-2013-1997,
and CVE-2013-2004; the addition of the _XEatDataWords API for use by
Xlib-based extension libraries, to help them avoid integer overflows when
it is necessary to discard data; removal of ancient, unused, incomplete
support for the Cray Unicos OS, and the DECnet and TLI transport types;
numerous improvements to compose files and locale data; man page macro
cleanups to improve compatibility with doclifter; and various other
code cleanups and compiler warning fixes.

Alan Coopersmith (1):
      libX11 1.6.0

Thomas Klausner (2):
      XCreateGC man page: Avoid .TS H and .TH macros
      cmsMath.c: Add missing stdio header for printf(3) in DEBUG build.