update config include

_includes/config.js.md

@@ -2,7 +2,7 @@
 DO NOT EDIT THIS FILE MANUALLY.
 Content for the following is generated by this script in the main repo:
 https://github.com/thelounge/thelounge/blob/master/scripts/generate-config-doc.js
-Last updated at 2023-12-12 16:26:27 (UTC) by Zach Bloomquist
+Last updated at 2024-04-07 14:22:01 (UTC) by Reto Brunner
 -->
 
 ## Server settings
@@ -267,6 +267,21 @@ their JSON configuration file.
 
 This value is set to `["sqlite", "text"]` by default.
 
+### `storagePolicy`
+
+When the sqlite storage is in use, control the maximum storage duration.
+A background task will periodically clean up messages older than the limit.
+
+The available keys for the `storagePolicy` object are:
+
+- `enabled`: If this is false, the cleaning task is not running.
+- `maxAgeDays`: Maximum age of an entry in days.
+- `deletionPolicy`: Controls what types of messages are being deleted.
+  Valid options are:
+  - `statusOnly`: Only delete message types which are status related (e.g. away, back, join, parts, mode, ctcp...)
+    but keep actual messages from nicks. This keeps the DB size down while retaining "precious" messages.
+  - `everything`: Delete everything, including messages from irc nicks
+
 ### `useHexIp`
 
 When set to `true`, users' IP addresses will be encoded as hex.