cvsimport: allow for multiple -M options
cvsimport: allow for multiple -M options

Use Getopt::Long instead of Getopt::Std to handle multiple -M options,
for all the cases when having a single custom regex is not enough.

Signed-off-by: Philippe Bruhat (BooK) <e7e694c58cd50e0324ec96918800bc35cd17629b@cpan.org>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git