New AdminContact struct and email.

[lukevers]

With AdminContact being a struct now, in emails it looks like this:

If this email was abusive or spam, please email {Alexander Bauer sasha@crofter.org 76AAD89B}.

But should it look like this?

If this email was abusive or spam, please email Alexander Bauer <sasha@crofter.org> 76AAD89B.