I've just pushed mitmproxy v0.11.2 out the door. This is primarily a bugfix release, but does have one very useful new feature: configuration files. All options available through command-line flags can now be set persistently in config files, for all the tools - see the documentation for more. Adding this was made much easier by ConfigArgParse, one of those small Python project gems that you feel more people should know about. Check it out.
This release also features the usual array of bugfixes and small improvements. In particular, we know handle upstream servers that knock back connections without SNI better, and the onboarding app now works in the OSX binary builds. Everyone should update.