Retry mechanism for large queues not working correctly

[mac-cain13]

When you send a lot of messages (more then the message envelope store) you could loose messages. Also the retrycount could get to you if you have a lot of invalid push IDs, because some messages have to be retried often before they are send

Solutions:

• Just size the recovery store infinitely with the queue, purge the whole store after sending all messages successfully (maybe we can purge a part of the store on an error)
• Remove the retry limit so we keep resending messages, so we assure that all messages are delivered to Apple and no messages are marked as failed before we even send them

[mac-cain13]

Deprecated the whole retry limit feature, we'll retry sending until Apple reports an error with the message and then stop trying to send the message. Also the message store will keep all messages in the queue, this will guarantee delivery of all messages and prevent messages from disappearing.