Merge branch '7-13-stable_changelog' into '7-13-stable'

7-13 stable: changelog update



See merge request !1901

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
-v 7.13.0 (unreleased)
+v 7.13.0
   - Only enable HSTS header for HTTPS and port 443 (Stan Hu)
   - Fix user autocomplete for unauthenticated users accessing public projects (Stan Hu)
   - Fix redirection to home page URL for unauthorized users (Daniel Gerhardt)