Do not create outgoing connection if hostname is empty or null.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@1455 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/messenger/server/OutgoingServerSession.java

@@ -70,6 +70,10 @@ public class OutgoingServerSession extends Session {
      * @return True if the domain was authenticated by the remote server.
      */
     public static boolean authenticateDomain(String domain, String hostname) {
+        if (hostname == null || hostname.length() == 0) {
+            // Do nothing if the target hostname is empty or null
+            return false;
+        }
         try {
             // TODO Check if the remote hostname is in the blacklist
             // TODO Keep a list of ports to connect to for each hostname or use the default