Cannot browse services declaring disco#items feature
In services discovery, services returning <feature var="http://jabber.org/protocol/disco#items"/> after a disco#info query should be browseable (http://www.xmpp.org/extensions/xep-0030.html#items-nodes). Returned nodes might also expose features like first level nodes (ie. Browse, Execute command, register, join and search should be accessible while browsing these nodes).