Merge branch 'cache-two-weeks' into 'master'

Expire Rails cache entries after two weeks

This should help prevent endless Redis growth.

See merge request !1903

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
+v 7.14.0 (unreleased)
+  - Expire Rails cache entries after two weeks to prevent endless Redis growth
+
 v 7.13.0 (unreleased)
   - Only enable HSTS header for HTTPS and port 443 (Stan Hu)
   - Fix user autocomplete for unauthenticated users accessing public projects (Stan Hu)

config/application.rb

@@ -96,6 +96,7 @@ module Gitlab
     end
 
     redis_config_hash[:namespace] = 'cache:gitlab'
+    redis_config_hash[:expires_in] = 2.weeks # Cache should not grow forever
     config.cache_store = :redis_store, redis_config_hash
 
     # This is needed for gitlab-shell