Support /dns/ as well as /dns4/ and /dns6/ in the websocket wasm ext impl (#1626)

Co-authored-by: Pierre Krieger <[email protected]>

Author: expenses

transports/wasm-ext/src/websockets.js

@@ -32,7 +32,7 @@ export const websocket_transport = () => {
 /// Turns a string multiaddress into a WebSockets string URL.
 // TODO: support dns addresses as well
 const multiaddr_to_ws = (addr) => {
-	let parsed = addr.match(/^\/(ip4|ip6|dns4|dns6)\/(.*?)\/tcp\/(.*?)\/(ws|wss|x-parity-ws\/(.*)|x-parity-wss\/(.*))$/);
+	let parsed = addr.match(/^\/(ip4|ip6|dns4|dns6|dns)\/(.*?)\/tcp\/(.*?)\/(ws|wss|x-parity-ws\/(.*)|x-parity-wss\/(.*))$/);
 	if (parsed != null) {
 		let proto = 'wss';
 		if (parsed[4] == 'ws' || parsed[4] == 'x-parity-ws') {