agent: Re-introduce --enable-extended-key-format.
* agent/gpg-agent.c (oEnableExtendedKeyFormat): Re-introduce. (parse_rereadable_options): Handle it in a special way. * agent/protect.c (agent_protect): Be safe and set use_ocb only to 1 or 0. * tools/gpgconf-comp.c: Add --enable-extended-key-format again.
This is required for backward compatible with profiles.
- Signed-off-by: Werner Koch <wk@gnupg.org>