http: Add noDelay to http.request() options.

Add the noDelay option to the http.request() options such that
.setNoDelay() will be called once a socket is obtained.

Add note about noDelay only applying to a TCP socket.

Author: rustyconover

doc/api/http.md

@@ -2213,6 +2213,9 @@ changes:
     **Default:** 8192 (8KB).
   * `method` {string} A string specifying the HTTP request method. **Default:**
     `'GET'`.
+  * `noDelay` {boolean} A boolean with which to call [`socket.setNoDelay()`][]
+    when a socket connection is established. This only applies when the
+    underlying connection is a TCP socket.
   * `path` {string} Request path. Should include query string if any.
     E.G. `'/index.html?page=12'`. An exception is thrown when the request path
     contains illegal characters. Currently, only spaces are rejected but that

lib/_http_client.js

@@ -164,6 +164,9 @@ function ClientRequest(input, options, cb) {
 
   this.socketPath = options.socketPath;
 
+  if (options.noDelay !== undefined)
+    this._deferToConnect('setNoDelay', [options.noDelay]);
+
   if (options.timeout !== undefined)
     this.timeout = getTimerDuration(options.timeout, 'timeout');