gpg: Do not use import-clean for LDAP keyserver imports.
* g10/options.h (opts): New field expl_import_only. * g10/import.c (parse_import_options): Set it. * g10/keyserver.c (keyserver_get_chunk): Add special options for LDAP.
I can be assumed that configured LDAP servers are somehow curated and
not affected by rogue key signatures as the HKP servers are. Thus we
don't clean the key anymore so that key certifications are kept even
if the public key has not yet been imported.
- GnuPG-bug-id: T5387