[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
Some ~poorly~ configured reverse proxy interfaces are not specifically configured to respond appropriately with a lowercase "A" in the autodiscover url. So our best course is to make the capitalization consistent with the one we are used to.
André
Phoenix Eve Aspacio
André Peters
Michael Kuron