Revert "Remove PAT from unleash settings"

This reverts commit a8c8a28e5587aa6b5f18f99b373ca60626a9aa46.

config/gitlab.yml.example

@@ -467,6 +467,13 @@ production: &base
       # enabled: true
       # primary_api_url: http://localhost:5000/ # internal address to the primary registry, will be used by GitLab to directly communicate with primary registry API
 
+  ## Feature Flag https://docs.gitlab.com/ee/user/project/operations/feature_flags.html
+  feature_flags:
+    unleash:
+      # enabled: false
+      # url: https://gitlab.com/api/v4/feature_flags/unleash/<project_id>
+      # app_name: gitlab.com # Environment name of your GitLab instance
+      # instance_id: INSTANCE_ID
 
   #
   # 2. GitLab CI settings

config/initializers/1_settings.rb

@@ -308,6 +308,13 @@ Gitlab.ee do
   Settings.geo.registry_replication['enabled'] ||= false
 end
 
+#
+# Unleash
+#
+Settings['feature_flags'] ||= Settingslogic.new({})
+Settings.feature_flags['unleash'] ||= Settingslogic.new({})
+Settings.feature_flags.unleash['enabled'] = false if Settings.feature_flags.unleash['enabled'].nil?
+
 #
 # External merge request diffs
 #