make app to turn on new zombie exec instead of always doing it

src/include/switch_types.h

@@ -1167,6 +1167,7 @@ typedef enum {
 	CF_LAZY_ATTENDED_TRANSFER,
 	CF_SIGNAL_DATA,
 	CF_SIMPLIFY,
+	CF_ZOMBIE_EXEC,
 	/* WARNING: DO NOT ADD ANY FLAGS BELOW THIS LINE */
 	/* IF YOU ADD NEW ONES CHECK IF THEY SHOULD PERSIST OR ZERO THEM IN switch_core_session.c switch_core_session_request_xml() */
 	CF_FLAG_MAX