gpg: Split key cleaning function for clarity.
* g10/key-clean.c (clean_key): Rename to clean_all_uids and split subkey cleaning into ... (clean_all_subkeys): new. Call that always after the former clean_key invocations.
Note that the clean_all_subkeys function will later be extended.
- Signed-off-by: Werner Koch <wk@gnupg.org>