For PR automake/414:

For PR automake/414:
Introduce option filename-length-max=99.
* doc/automake.texi (Options): Document it.
* configure.ac (AM_INIT_AUTOMAKE): Use it.
* lib/Automake/Options.pm (_process_option_list): Recognize it.
* automake.in (handle_dist): Set FILENAME_FILTER.
* lib/am/distdir.am (distdir) [FILENAME_FILTER]: Diagnose long
filenames.
* tests/fn99.test: New file.
* tests/Makefile.am (TESTS): Add fn99.test.