throw security exception instead of going to next srv entry

src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java

@@ -308,6 +308,8 @@ public class XmppConnection implements Runnable {
 
 						if (startXmpp())
 							break; // successfully connected to server that speaks xmpp
+					} catch(final SecurityException e) {
+						throw e;
 					} catch (final Throwable e) {
 						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage() +"("+e.getClass().getName()+")");
 						if (!iterator.hasNext()) {