Mark 8.0.2 as released

[ci skip]

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
-v 8.0.2 (unreleased)
+v 8.0.2
   - Fix default avatar not rendering in network graph (Stan Hu)
   - Skip check_initd_configured_correctly on omnibus installs
   - Prevent double-prefixing of help page paths