The whole point of keeping the m4 and po/Makefile.in.in is to not need to have the same version all over the place anyway, otherwise we might as well put all these files to .gitignore... Remove some old m4 macros as well.
b6c4b865
and fix the M4 ignore rules
This reverts commit 8b71b1041b. Most developers did not update their gettext install Bumping gettext requirement is useless.
8b71b1041b