gpg: Merge --rfc4880bis features into --gnupg
* g10/gpg.c (oRFC4880bis): Remove. (opts): Make --rfc4880bis a Noop. (compliance_options): Make rfc4880bis to gnupg. (set_compliance_option): Remove rfc4880bis stuff. (main): Ditto. Note that this now activates the --mimemode option. * g10/keygen.c (keygen_set_std_prefs): Remove rfc4880bis protection. (keygen_upd_std_prefs): Always announce support for v5 keys. (read_parameter_file): Activate the v4 and v5 keywords.