Do not auto-create users when reply by mail

[tophee (Christoph)]

I was going to say that the plan for version 1.9 is to allow users to provide a secondary email address (which, I assume, would prevent staged users to be created at least for that email address) but that is apparently not the case. But there is a PR-welcome for this:

Two emails for one user

I think we’re all generally in favour of N email support, but the implications of supporting more than a single backup email are not immediately clear. This is one of those arguments that is best resolved with code. Simply: Do a PR for 1 backup email, which you know will get accepted without much ado (and with much ) then we can resume the topic of N emails. If need be, do some basic mockups of how this’d work in Discourse (GitHub seems to provide a good frame of reference) before…