admin interface
	users management
		statistics about each user
		statistics about each connection
	node management
		node restart/shutdown
		statistics about memory usage
	backup management

S2S:
	* rewrite S2S key validation

more correctly work with SRV DNS records (priority, weight, etc...)
TLS
Privacy rules
make roster set to work in one transaction
add traffic shapers to c2s connection before authentification
add traffic shapers to s2s connections
more traffic shapers
SNMP
PubSub
MUC: remove empty non-persistent conferences after timeout
MUC: remove a lot of debugging output