Support extended regex

src/ruleng_ubus.c

@@ -64,7 +64,7 @@ static bool ruleng_bus_blob_compare_primitive(
 				if (strcmp(blobmsg_get_string(a), blobmsg_get_string(b)) != 0)
 					goto exit;
 			} else {
-				reti = regcomp(&regex_exp, blobmsg_get_string(a), 0);
+				reti = regcomp(&regex_exp, blobmsg_get_string(a), REG_EXTENDED);
 
 				if (reti) {
 					RULENG_ERR("Could not compile regex\n");