mail/bogofilter*: Prepare LMDB 1.0 transition

Here's what we do now:

• mail/bogofilter currently depends on lmdb0, a 0.9.X port, so it continues to work as before
• add a new mail/bogofilter-lmdb1 port that depends on lmdb, the 1.0 version of the LMDB database.
• add the upstream patch for bogofilter 1.3.0.rc1 that I made and that delphij@ prepared for integration into the ports tree - thanks!

Here's the plan for end of 2026:

• AT THE SAME TIME:
  • upgrade mail/bogofilter to depend on LMDB 1.0
  • portrm mail/bogofilter-lmdb1
  • add a MOVED entry to redirect from bogofilter-lmdb1 to bogofilter.

While here, clean up and rearrange the Makefiles.

PR: 296519

Reviewed by: arrowd
Pull Request: https://github.com/freebsd/freebsd-ports/pull/551