http: Add fixme comment about ECONNRESET handling

lib/http.js

@@ -493,6 +493,8 @@ OutgoingMessage.prototype._writeRaw = function(data, encoding) {
     // The socket was destroyed.  If we're still trying to write to it,
     // then something bad happened.
     // If we've already raised an error on this message, then just ignore.
+    // XXX This was necessary in v0.8, but in v0.10, we no longer ignore
+    // ECONNRESET anyway.  Is this still required?
     if (!this._hadError) {
       this.emit('error', createHangUpError());
       this._hadError = true;