The Grande 'sendall()' patch, copied from release21-maint. Fixes #516715.

Replaces calls to socket.send() (which isn't guaranteed to send all data)
with the new socket.sendall() method.

Lib/httplib.py

@@ -403,7 +403,7 @@ class HTTPConnection:
         if self.debuglevel > 0:
             print "send:", repr(str)
         try:
-            self.sock.send(str)
+            self.sock.sendall(str)
         except socket.error, v:
             if v[0] == 32:      # Broken pipe
                 self.close()