[ci skip] Merge branch 'master' into 43770-change-clear-runners-cache-ujs-action-to-an-axios-request

* master: (68 commits)
  Upgrade Workhorse to 4.0.0
  naming things
  Update GitLab Pages to v0.7.0
  Minor fixes in API doc
  Use Project#full_name instead of name_with_namespace
  Fix tests not completely disabling Gitaly
  Move OperationService#UserRemoveBranch
  Move OperationService#UserCreateBranch
  Move CommitService#Languages to OPT_OUT
  Move RefService#CreateBranch to OPT_OUT
  Move RefService#DeleteBranch to OPT_OUT
  Move OperationService#UserRevert to OPT_OUT
  Move OperationService#UserAddTag to OPT_OUT
  Move CommitService::CommitPatch to OPT_OUT
  Change to Pacific Time Zone
  Merge branch 'pages-6-1-gitlab-10-5' into 'security-10-5'
  Merge branch 'sh-fix-otp-backup-invalidation-10-5' into 'security-10-5'
  Remove wrong assumption about Runners cache GC
  Add CommonMark markdown engine
  add nginx_status monitoring details
  ...