mail/bogofilter*: undeprecate LMDB/KC/SQLITE

The deprecation of bogofilter-bdb wasn't under the MASTERDIR .if checks,
so inadvertently spilled over to the bogofilter (based on LMBD), -kc
(Kyoto Cabinet) and -sqlite (SQLite3) variant of the ports.
These three are supported beyond the expiration date (currently 2025-06-30).

The deprecation only refers to the bogofilter-bdb, i.e. Berkeley DB
based, port and is purely based on Oracle taking away, for instance,
old Berkeley DB 5 patches from the public non-login website,
difficulties with obtaining download URLs, and other historic material.

Reported by: Brad Waite