The code in _scproxy (a mac specific helper module to detect proxy settings) had the wrong logic for detecting if the checkbox 'Exclude simple hostnames' is checked. This checkin fixes that.
The code in _scproxy (a mac specific helper module to
detect proxy settings) had the wrong logic for detecting
if the checkbox 'Exclude simple hostnames' is checked. This
checkin fixes that.

As a result the test failure 'Issue8455' goes away on systems
where the checkbox is not checked.

I'm carefully avoiding saying that is fixes that issue,
test_urllib2_localnet assumes that system proxy settings are
empty (not just on OSX, see Issue8455 for details).

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator