AMQP Settings Missing from Documentation (Artemis)

[wa...@tutanota.com]

(Please see the AMQP spec if something is not clear/detailed enough)
In the official documentation a lot of the AMQP settings seem to be missing for eg:

1) 
AMQP link flow control (ie message limits) settings:
These can be glimpsed in some examples but they are never explicitly mentioned
amqpCredits
amqpLowCredits
What do these mean?

2)
AMQP session level flow control: (ie frame limits [both ways!] Controlling the number of frames able to be sent/received (this is pretty much: byte size window limits))

I can't see a setting for this -- unless it's: "producerWindowSize" (is this only for core protocol?)
 In the section: [Blocking AMQP Producers] it is just using link level flow control (not session level flow control). What's the point of sending a 100 credits and then replenishing once credit reaches 30? Isn't this a bottomless pit? (Shouldn't credit be able to reach 0? And shouldn't replenishment only happen when unACKed messages start getting ACKed?)
 Is the max-size-bytes parameter using session level flow control?

3) 
AMQP batch ACK settings:
The only value I saw for this was: confirmation-windowsize but this is only set on the clients?
Is there any such value for the broker?