g10: Shorten unreasonably long option.
* g10/gpg.c (opts): Rename 'generate-revocation-certificate' to 'generate-revocation'. * doc/gpg.texi: Update accordingly. * po: Update translations.
- GnuPG-bug-id: T2700
- Fixes-commit: ec1bd3ae685e95563e38077ab3c1655fd55dea07
- Signed-off-by: Justus Winter <justus@g10code.com>