[Windows, Python 3] When GreenSocket raises socket.error, the winerror attribute is not set correctly

[yoni1]

GreenSocket is "intended to be 100% API-compatible" with socket.socket, according to its docstring.

Starting in Python 3.3, socket.error is no longer a separate class but merged with OSError (and in Windows, merged also with WindowsError). Thus, in Windows, this exception has an attribute winerror in addition to the usual errno.

OS exceptions raised from the regular socket.socket have this winerror attribute set. However, OS exceptions raised from GreenSocket do not.