Add support for Loon UDP relay (SS/SSR/Trojan)

backend/sub-store.js

@@ -2547,7 +2547,6 @@ var ProxyUtils = (function () {
                                 );
                             }
                         }
-
                         return `${proxy.name}=shadowsocks,${proxy.server},${proxy.port},${proxy.cipher},"${proxy.password}"${obfs_opts}${udp_opts}${tfo_opts}`;
                     case "ssr":
                         return `${proxy.name}=shadowsocksr,${proxy.server},${proxy.port},${proxy.cipher
@@ -2576,7 +2575,7 @@ var ProxyUtils = (function () {
                     case "trojan":
                         return `${proxy.name}=trojan,${proxy.server},${proxy.port},"${proxy.password
                         }"${proxy.sni ? ",tls-name:" + proxy.sni : ""},skip-cert-verify:${proxy["skip-cert-verify"] || "false"
-                        }`;
+                        }${udp_opts}`;
                     case "http":
                         tls_opts = "";
                         const base = `${proxy.name}=${proxy.tls ? "http" : "https"},${proxy.server