http: Allow write to socket on timeout events

* fixes nodejs#3460

lib/http.js

@@ -1657,7 +1657,7 @@ function connectionListener(socket) {
 
   socket.setTimeout(2 * 60 * 1000); // 2 minute timeout
   socket.once('timeout', function() {
-    socket.destroy();
+    process.nextTick(function() { socket.destroy(); });
   });
 
   var parser = parsers.alloc();

test/simple/test-http-response-timeout-handler.js

@@ -0,0 +1,49 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('../common');
+var assert = require('assert');
+var http = require('http');
+var response = "";
+
+var server = http.createServer(function(req, res) {
+  res.socket.setTimeout(10);
+  res.socket.on('timeout', function () {
+    res.writeHead(200, {'Content-Type': 'text/plain'});
+    res.end('foo');
+  });
+});
+server.listen(common.PORT);
+
+server.on('listening', function() {
+  http.get({
+    port: common.PORT
+  }, function(res) {
+    res.on('data', function(data) {
+      response += data;
+      server.close();
+    });
+  });
+});
+
+process.on('exit', function() {
+  assert.equal(response, "foo");
+});