git subrepo commit (merge) mailcow/src/mailcow-dockerized

subrepo:
  subdir:   "mailcow/src/mailcow-dockerized"
  merged:   "81fb18894"
upstream:
  origin:   "https://github.com/mailcow/mailcow-dockerized.git"
  branch:   "master"
  commit:   "4ca02ecee"
git-subrepo:
  version:  "0.4.6"
  origin:   "???"
  commit:   "???"

Update to upstream 2026-10.  Local patches re-applied by hand
(no Unbound DNS for containers, IPv6 off by default, fake-MySQL
stubs in dockerapi, Postfix overrides, no .env symlink); dropped
the unused dovecot and clamd Dockerfile patches.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Change-Id: I2c2c194d1d436b841358685f5f94aef09eb19ae8
1364 files changed