Add destroy methods to HTTP messages

needs tests (particularly for pipeline situations)

lib/http.js

@@ -210,6 +210,12 @@ function IncomingMessage (socket) {
 util.inherits(IncomingMessage, stream.Stream);
 exports.IncomingMessage = IncomingMessage;
 
+
+IncomingMessage.prototype.destroy = function (error) {
+  this.socket.destroy(error);
+};
+
+
 IncomingMessage.prototype.setEncoding = function (encoding) {
   var StringDecoder = require("string_decoder").StringDecoder; // lazy load
   this._decoder = new StringDecoder(encoding);
@@ -303,6 +309,12 @@ function OutgoingMessage (socket) {
 util.inherits(OutgoingMessage, stream.Stream);
 exports.OutgoingMessage = OutgoingMessage;
 
+
+OutgoingMessage.prototype.destroy = function (error) {
+  this.socket.destroy(error);
+};
+
+
 // This abstract either writing directly to the socket or buffering it.
 OutgoingMessage.prototype._send = function (data, encoding) {
   // This is a shameful hack to get the headers and first body chunk onto