Replicant

I was told that git config format.subjectPrefix "some-prefix" could be used to generate patches with the correct prefix. Right now this is either set manually by people sending patches (with git format-patch --subject-prefix) or done in the python tool to generate patches and the email cover.

So for people not using this software it would be a good idea to document that, at least in the instructions to contribute and/or send patches.

We'd probably also need to look in the python tool if that can improve the code or not. The subject prefix autodetection is not always right though, so maybe it's better if people set it manually?