config: added missing config

configs/development.ini

@@ -191,6 +191,9 b' rc_cache.repo_object.expiration_time = 2'
 ; more Redis options: https://dogpilecache.sqlalchemy.org/en/latest/api.html#redis-backends
 #rc_cache.repo_object.arguments.distributed_lock = true
 
+; auto-renew lock to prevent stale locks, slower but safer. Use only if problems happen
+#rc_cache.repo_object.arguments.lock_auto_renewal = true
+
 ; Statsd client config
 #statsd.enabled = false
 #statsd.statsd_host = 0.0.0.0