Use the --po-domain option to gnulib-tool to create a new textdomain
that can be used by gnulib files for translations. This way, we don't
have to maintain the list of all files that require translations in
gnulib.
* bootstrap.conf: Use --po-domain and --po-base options to create a
separate base for gnulib translations
* src/main.c(i18n_initialize): Call bindtextdomain on wget-gnulib to
include those translations as well
* Makefile.am: Add new directory gnulib_po to SUBDIRS
* configure.ac: Generate gnulib_po/Makefile.in
* lib/Makefile.am: Set AM_CPPFLAGS to empty since gnulib.mk expects it
to be set
* .gitignore: Exclude /lib/Makefile.am
* bootstrap.conf: Use --makefile-name=gnulib.mk with gnulib-tool
* configure.ac: Use wget_MANYWARNINGS()
* lib/Makefile.am: Define empty noinst_LIBRARIES and MAINTAINERCLEANFILES
* m4/wget_manywarnings.m4: New file from GNU Wget2
* src/Makefile.am: Use WARN_CFLAGS for AM_CFLAGS