Reliable multi-file install for man pages.
* lib/am/mans.am: Include inst-vars.am.
(install-man%SECTION%): Gather lists of man pages to install,
and install up to 40 of those that do not have to be renamed
at once. Fail if installation of any file fails.
(uninstall-man%SECTION%): Rewrite to use fewer sed invocations.
* doc/automake.texi (Man pages): Hint the user to the fast path.
Indentation fix.
* tests/instmany-mans.test: New test.
* tests/Makefile.am: Update.
Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>