Allow use of debug flag names for all tools.
* g13/g13.c: Make use of debug_parse_flag. * scd/scdaemon.c: Ditto. * sm/gpgsm.c: Ditto * agent/gpg-agent.c: Ditto. But do not terminate on "help" * dirmngr/dirmngr.c: Ditto.
- Signed-off-by: Werner Koch <wk@gnupg.org>