libiberty and regex.* updated

[Milan Zamazal]

I've updated the quite old versions of libiberty and regex.[ch] to newer
versions.  GNATS compiles fine on my system after the update, but this
may not apply to other, especially non-GNU, systems.  If you can, please
try to compile the current GNATS CVS snapshot on your favorite system
and report any contingent problems.

Thanks,

Milan Zamazal

-- 
real programmer?  don't get me started.  if you need to hide your
pathetic excuse for a carreer behind super-macho languages like C, C++,
and/or Perl instead of writing clean, maintainable, efficient code, you
aren't much of a real programmer in my view.  -- Erik Naggum in comp.emacs