Message4319

We follow cpython, and so use the same message as them

Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket
>>> socket.getaddrinfo('somehost', 9999)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
socket.gaierror: (11001, 'getaddrinfo failed')
>>>

If you can persuade the cpython folks to change their message, then we
can follow.

I don't expect that this will ever change.

Personally, I'd just use something like

err_msg = None
try:
    addr_info = socket.getaddrinfo(host, port, etc)
except socket.gaierror:
    err_msg = "Unknown host"