Add support for new keypair style 3pid invites (add an option to joinRoom for specifying the signing url)

lib/http-api.js

@@ -365,6 +365,34 @@ module.exports.MatrixHttpApi.prototype = {
         );
     },
 
+    /**
+     * Perform a request to an arbitrary URL.
+     * @param {Function} callback Optional. The callback to invoke on
+     * success/failure. See the promise return values for more information.
+     * @param {string} method The HTTP method e.g. "GET".
+     * @param {string} uri The HTTP URI
+     * @param {Object} queryParams A dict of query params (these will NOT be
+     * urlencoded).
+     * @param {Object} data The HTTP JSON body.
+     * @param {Number=} localTimeoutMs The maximum amount of time to wait before
+     * timing out the request. If not specified, there is no timeout.
+     * @return {module:client.Promise} Resolves to <code>{data: {Object},
+     * headers: {Object}, code: {Number}}</code>.
+     * If <code>onlyData</code> is set, this will resolve to the <code>data</code>
+     * object only.
+     * @return {module:http-api.MatrixError} Rejects with an error if a problem
+     * occurred. This includes network problems and Matrix-specific error JSON.
+     */
+    requestOtherUrl: function(callback, method, uri, queryParams, data,
+                                localTimeoutMs) {
+        if (!queryParams) {
+            queryParams = {};
+        }
+        return this._request(
+            callback, method, uri, queryParams, data, localTimeoutMs
+        );
+    },
+
     /**
      * Form and return a homeserver request URL based on the given path
      * params and prefix.