add alternatives to WITHOUT_DEFAULT_LISTENER

* allows setting WITH_TCP_LISTENERS and WITH_UDP_LISTENERS when WITHOUT_DEFAULT_LISTENER is defined

kamailio/default-listeners.cfg

@@ -12,6 +12,15 @@ listen=UDP_LISTENER_SIP
 listen=TCP_LISTENER_SIP
 listen=UDP_LISTENER_ALG
 listen=TCP_LISTENER_ALG
+#!else
+#!ifdef WITH_TCP_LISTENERS
+listen=TCP_LISTENER_SIP
+listen=TCP_LISTENER_ALG
+#!endif
+#!ifdef WITH_UDP_LISTENERS
+listen=UDP_LISTENER_SIP
+listen=UDP_LISTENER_ALG
+#!endif
 #!endif
 
 #!ifdef WITH_INTERNAL_LISTENER