Add labs documentation for Mjolnir

docs/labs.md

@@ -49,3 +49,9 @@ That's it. Now should see your new counter under the header.
 ## Multiple integration managers (`feature_many_integration_managers`)
 
 Exposes a way to access all the integration managers known to Riot. This is an implementation of [MSC1957](https://github.com/matrix-org/matrix-doc/pull/1957).
+
+## New ways to ignore people (`feature_mjolnir`)
+
+When enabled, a new settings tab appears for users to be able to manage their ban lists. 
+This is a different kind of ignoring where the ignored user's messages still get rendered, 
+but are hidden by default.

riot.im/develop/config.json

@@ -27,7 +27,8 @@
         "feature_sas": "labs",
         "feature_room_breadcrumbs": "labs",
         "feature_state_counters": "labs",
-        "feature_many_integration_managers": "labs"
+        "feature_many_integration_managers": "labs",
+        "feature_mjolnir": "labs"
     },
     "welcomeUserId": "@riot-bot:matrix.org",
     "piwik": {