Default to passive mode.  See SF bug #126851.
Default to passive mode.  See SF bug #126851.

This is slightly controversial, but after reading the argumentation in
the bug tracker for and against, I believe this is the right solution.
Let me know if it breaks for you, and how.

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