Adding support for UNIX Sockets

lib/adapters/http.js

@@ -72,8 +72,6 @@ module.exports = function httpAdapter(config) {
     var agent = isHttps ? config.httpsAgent : config.httpAgent;
 
     var options = {
-      hostname: parsed.hostname,
-      port: parsed.port,
       path: buildURL(parsed.path, config.params, config.paramsSerializer).replace(/^\?/, ''),
       method: config.method,
       headers: headers,
@@ -81,6 +79,13 @@ module.exports = function httpAdapter(config) {
       auth: auth
     };
 
+    if (config.socketPath) {
+      options.socketPath = config.socketPath;
+    } else {
+      options.hostname = parsed.hostname;
+      options.port = parsed.port;
+    }
+
     var proxy = config.proxy;
     if (!proxy && proxy !== false) {
       var proxyEnv = protocol.slice(0, -1) + '_proxy';