Merge branch 'maint'
* maint:
docs: AM_CFLAGS: remove reference to non-existing "more detailed" desc
maintcheck: prefer '$(am__cd)' over plain 'cd'
fetch: improve, and reduce code duplication
docs: add rule to generate manuals for www.gnu.org
docs: copy the 'gendocs.sh' script from Texinfo CVS repository
sync: update files from upstream with "make fetch"
release: generate a stub for the release announcement
release: distinguish major and minor releases
tests: avoid two spurious failures on FreeBSD