doc: Add a man page for gpg-error-config.
* doc/gpgrt.texi: New. Just a start for now. * doc/gpl.texi, doc/lgpl.texi: New. Take from Libgcrypt. * doc/yat2m.c: New. Take from GnuPG master. * doc/Makefile.am: New. * configure.ac (AC_CONFIG_FILES): Add doc/Makefile. * Makefile.am (SUBDIRS): Add doc/. * build-aux/mdate-sh, build-aux/texinfo.tex: New.
- Signed-off-by: Werner Koch <wk@gnupg.org>