mm@ is the maintainer and doesn't have a Phabricator account, but I want to get this sorted out here first before asking him for approval. Maybe 1.8.1 gets released before committing 1.8.0 anyway.
Besides the usual updating, I switched away from GitHub to theforeman.org for the distfile.
Proposed commit message:
net/foreman-proxy: update to 1.8.0 Approved by: swills (mentor), mat (mentor), mm (maintainer)