OF-772: Ignore error/result IQ packets

IQ packet handlers generally should not try to route error and result
packet types. This patch addresses the issue for certain MUC IQs and
Ping

src/java/org/jivesoftware/openfire/handler/IQPingHandler.java

@@ -22,6 +22,7 @@ import java.util.Iterator;
 import org.jivesoftware.openfire.IQHandlerInfo;
 import org.jivesoftware.openfire.disco.ServerFeaturesProvider;
 import org.xmpp.packet.IQ;
+import org.xmpp.packet.IQ.Type;
 
 /**
  * Implements the XMPP Ping as defined by XEP-0199. This protocol offers an
@@ -55,7 +56,10 @@ public class IQPingHandler extends IQHandler implements ServerFeaturesProvider {
 	 */
 	@Override
 	public IQ handleIQ(IQ packet) {
-		return IQ.createResultIQ(packet);
+		if (packet.getType().equals(Type.get)) {
+			return IQ.createResultIQ(packet);
+		}
+		return null;
 	}
 
 	/*

src/java/org/jivesoftware/openfire/muc/spi/LocalMUCUser.java

@@ -369,7 +369,7 @@ public class LocalMUCUser implements MUCUser {
 
     public void process(IQ packet) {
         // Ignore IQs of type ERROR or RESULT sent to a room
-        if (IQ.Type.error == packet.getType()) {
+        if (IQ.Type.error == packet.getType() || IQ.Type.result == packet.getType()) {
             return;
         }
         lastPacketTime = System.currentTimeMillis();