Don't send out too much pushes at once

[guusdk]

As explained on https://github.com/anurodhp/Monal/issues/354#issuecomment-614562560:

But: don't send too much of this pushes in a row (for example when XEP-0198 stream management decides to hibernate the stream having multiple messages still being unacked) because every push will create a visible notification on iOS.

This scenario is something you should consider, because TCP needs some time to timeout and all stanzas sent into an already dead but not timed out TCP session must trigger a push, otherwise messages will be seen only when the user opens the app eventually.

Followed up in https://github.com/anurodhp/Monal/issues/354#issuecomment-614964197

your server is sending too many pushes for this token. I searched the logs and i see it hitting the rate limit. The limit max 5 pushes for an account per second and i am seeing way more than that.

Apr 16 05:41:46 ios13push.monal.im:push_appserver warn Rate limit for node '4B179F90-77E4-4EE9-A7B2-' reached, ignoring push request (and returning 'wait' error)
Apr 16 05:41:46 ios13push.monal.im:push_appserver warn Rate limit for node '4B179F90-77E4-4EE9-A7B2-' reached, ignoring push request (and returning 'wait' error)
Apr 16 05:41:46 ios13push.monal.im:push_appserver warn Rate limit for node '4B179F90-77E4-4EE9-A7B2-' reached, ignoring push request (and returning 'wait' error)
Apr 16 05:41:46 ios13push.monal.im:push_appserver warn Rate limit for node '4B179F90-77E4-4EE9-A7B2-' reached, ignoring push request (and returning 'wait' error)
Apr 16 05:41:46 ios13push.monal.im:push_appserver warn Rate limit for node '4B179F90-77E4-4EE9-A7B2-' reached, ignoring push request (and returning 'wait' error)
Apr 16 05:41:46 ios13push.monal.im:push_appserver warn Rate limit for node '4B179F90-77E4-4EE9-A7B2-' reached, ignoring push request (and returning 'wait' error)