New file in helpers.
Remove AC_FUNC_VPRINTF macro and header tests.
Update NEWS file.
Bug fix in regex.
Merge branch 'gawk-4.1-stable' into new-vms
Fixes in helpers/testdfa.c.
Merge branch 'gawk-4.1-stable' into new-vms
Add exact case build support and doc fixes for VMS.
Update to automake 1.13.4 and libtool 2.4.2.418.
Update NEWS.
Merge branch 'gawk-4.1-stable' into new-vms
Make extensions controlled by configure time option.
Merge branch 'gawk-4.1-stable' into new-vms
Fix commit problem with doc/gawk.info.