Merge branch 'fc/publish' into integration

Merge branch 'fc/publish' into integration

* fc/publish:
  remote: show published status and help
  branch: add quick marker to see published status
  sha1_name: add support for @{publish} marks
  sha1_name: simplify track finding
  branch: display publish branch
  push: add --set-publish option
  branch: add --set-publish-to option
  Add concept of 'publish' branch
  t5516 (fetch-push): fix test restoration