[jdev] new-style session request

[JackieZhang]

hi,all
   i download the newest version jabberd2.1.23,i find that my jabberd client can't login the jabberd2.1.23,but my jabberd client can login to jabberd2.1.15,i get the xmpp message:
 
 SEND:
<iq id='session' type='set'><session xmlns='urn:ietf:params:xml:ns:xmpp-session'/></iq>
RECV:
<iq id='session' type='error' xmlns='jabber:client'><error code='501' type='cancel'><feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/></error><session xmlns='urn:ietf:params:xml:ns:xmpp-session'/></iq> 

why the jabberd2.1.23 can not support the new-style session request(xmpp protocal) ?
				
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jackie