Concerning Python patch 3.6.12-socketmodule.patch

[Mark Geisert]

Hi Marco,
Recently there's been a complaint about that patch on the Cygwin mailing list. 
The patch was meant to allow same-machine communication between Cygwin Python 
programs via an AF_UNIX socket.  The patch works because both ends of the 
connection are Python programs that have the patch.

The problem reported by the user is that when a Python program attempts to 
communicate with ssh-agent, the connection freezes.  This is due to the above 
patch being applied only to the Python end (of course).

Given that we need the patch for Python build tests, could you handle an 
environment variable setting to choose the behavior of the patch?
In other words. a revised patch would consult an environment variable 
PYTHON_NET_DISABLE_CREDENTIALS to decide whether to do what the current patch 
does.  I guess the pythonXX.cygport file would have to define that env var.

Does that sound like a workable scheme to you?
Thanks,

..mark