Added warn logging when a session is not found for a packet.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@1158 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/messenger/SessionManager.java

@@ -651,6 +651,8 @@ public class SessionManager extends BasicModule {
         // Return null if the JID's data belongs to a foreign server. If the server is
         // shutting down then serverName will be null so answer null too in this case.
         if (serverName == null || !serverName.equals(domain)) {
+            Log.warn("Session not found for packet. Packet domain: " + domain + " Server name: " +
+                    serverName);
             return null;
         }