Merge pull request #1037 from zom/optional_sessions

If session establishment is optional, skip it

Author: chrisballinger

Core/XMPPStream.m

@@ -4058,7 +4058,10 @@ - (void)continuePostBinding:(BOOL)skipStartSessionOverride
 	// Check to see if a session is required
 	// Don't forget about that NSXMLElement bug you reported to apple (xmlns is required or element won't be found)
 	NSXMLElement *f_session = [features elementForName:@"session" xmlns:@"urn:ietf:params:xml:ns:xmpp-session"];
-	
+    if (f_session && [f_session elementForName:@"optional"]) {
+        skipStartSessionOverride = YES;
+    }
+    
 	if (f_session && !skipStartSession && !skipStartSessionOverride)
 	{
 		NSXMLElement *session = [NSXMLElement elementWithName:@"session"];