Florian Schmaus d07ed60737 Add support for "Caps Optimizations" ... Smack's previous entity caps implementation assumed that an entity lost its entity caps feature as soon as a presence without caps from that entity was received. But according to XEP-0115 § 8.4, this is a perfectly normal optimization technique. We now reset the caps state after an available presence becomes unavailable. Also introduce PresenceEventListener, which is required for this feature. Also make Roster.preApprove() take a BareJid as argument. Fixes SMACK-723.		2016-06-30 17:01:46 +02:00
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smack	Add support for "Caps Optimizations"	2016-06-30 17:01:46 +02:00