Move XMailEntity (and drop NewXMailEntity)
Reimplement passwords on mailing lists
Remove "New" prefix on multiple classes
Make sure we actually send a message when using /xmail build
Remove old attachment system, remove old mail types.
Remove REALLY old debug lines
Add some methods to NewMail
Remove "New" prefix on Mail/Attachments
Update todo: forwarding of attachments / specific attachment handling
More plugin reconstruction
Repair all (known) cases of commented send-mail.
Add onDisbale() locking for server manager shutdown
misc