GNU M4 NEWS - User visible changes.

* Noteworthy changes in Version 1.4.14 (2010-02-24) [stable]
  Released by Eric Blake, based on git version 1.4.13.*

** Fix regression introduced in 1.4.12 where executing with stdout closed
   could crash m4 on exit on some platforms.

** Fix regressions introduced in 1.4.13 in the `esyscmd' builtin, where
   closed file descriptors could interfere with child execution, and where
   a child status of 127 made m4 print a spurious message to stderr.

** Fix a security hole in 'make dist', present since at least M4 1.4, that
   could affect anybody attempting to redistribute modified sources (see
   Automake CVE-2009-4029).

** A number of portability improvements inherited from gnulib.