Fix a bug in HTTP 1.1 pipelining that caused Requests to be over-written.

We use the ClientConnection object to tie requests, responses and errors
together. This is an HTTP 1.0 assumption, but we can fix it by just making
copies of the connection object when we handle multiple requests.

libmproxy/proxy.py

@@ -454,9 +454,10 @@ class ProxyHandler(SocketServer.StreamRequestHandler):
 
     def handle(self):
         cc = ClientConnection(self.client_address)
-        cc.send(self.mqueue)
         while not cc.close:
+            cc.send(self.mqueue)
             self.handle_request(cc)
+            cc = cc.copy()
         self.finish()
 
     def handle_request(self, cc):