g13: Move some code to a separate module.
* g13/g13-common.c, g13/g13-common.h: New. * g13/Makefile.am (g13_SOURCES): Add new files. * g13/g13.c (g13_errors_seen): Move to g13-common.c. (cmdline_conttype): New. (main): Use g13_init_signals and g13_install_emergency_cleanup. (emergency_cleanup, g13_exit): Move to g13-common.c. * g13/g13.h: Move OPT and some other code to g13-common.h.
- Signed-off-by: Werner Koch <wk@gnupg.org>