PyPy 2.3 compatibility fix
PyPy 2.3 compatibility fix

In PyPy 2.3 socket.socket has no _sock property which causes eventlet
failures.
https://github.com/eventlet/eventlet/pull/97

tempbottle/eventlet,tempbottle/eventlet,lindenlab/eventlet,collinstocks/eventlet,lindenlab/eventlet,lindenlab/eventlet,collinstocks/eventlet