Handle when sponsors engage in harassing behavior

[pbowyer]

Currently the code of conduct says sponsors are also subject to the anti-harassment policy, but doesn't state what action will be taken if they breach it (sponsors are not defined as a subset of participants, so as it stands they are not included). To clarify this I've included Sponsors in the 'action' paragraph.

[remy]

Aren't the sponsors also participants?

@janl any thoughts/feelings about this?

[janl]

Maybe just include sponsors in the actions part?

[matt2000]

FWIW, this seems to me like a good place to be explicit about it. If the public gets a vote, I vote in favor of the merge. :-)