[Release] pagure: 3.7.1

[Pierre-Yves Chibon]

Good Morning Everyone,

While testing 3.7 we ran into a couple of things we wanted to fix, so here is:
3.7.1

Here is its corresponding changelog:
* Tue Sep 05 2017 Pierre-Yves Chibon <pingou(a)pingoured.fr&gt; - 3.7.1-1
- Update to 3.7.1
- Fix the UPGRADING documentation
- Add the API endpoint to edit multiple custom fields to the doc (Clement
  Verna)

This time with consistent versions :)

Happily running in stg (pkgs and pagure).


Happy hacking!
Pierre