gpg: Remove MDC options
* g10/gpg.c: Tuen options --force-mdc, --no-force-mdc, --disable-mdc and --no-disable-mdc into NOPs. * g10/encrypt.c (use_mdc): Simplify. MDC is now almost always used. (use_aead): Ignore MDC options. Print warning for missing MDC feature flags. * g10/pkclist.c (warn_missing_mdc_from_pklist): Rename to ... (warn_missing_aead_from_pklist): this and adjust.
The MDC is now always used except with --rfc2440 which will lead to a
a big fat warning.
- Signed-off-by: Werner Koch <wk@gnupg.org>