[Web] Add system mails (send mails to all mailboxes via LMTP)
[Web] Allow to add more administrators
[Web] Fix domain administrator editing
[Web] Remove some foreign keys
[Web] Remove username from API
[Web] Remove more .php extension from code
[Web] More minor fixes
[Watchdog] Fix IP detection with multiple networks
[Web] Show API field (no docs, no support, wip)
[Web] haveibeenpwned.com implementation
[Web] User and domain admin ACL (no docs, no support, wip)
[Web] Some minor fixes
[Web] Duplicate DKIM keys from a single domain to a single or multiple domains
[Web] WIP: Started Ratelimit rework
[Web] Show RL in overview of mailbox and domains
[Web] Move RL function out of mailbox functions file
[Web] Some language fixes/changes