airsonic: added airsonic-refix

wiki/airsonic-advanced.md

@@ -36,7 +36,8 @@ Log in with the clients now works correctly.
 
 It is possible to use many different clients because the server is compatible
 with all the Subsonic clients.
-These can be found in the [Subsonic entry](./subsonic.md#clients).
+These can be found in the [Subsonic entry](./subsonic.md#clients) and the [Airsonic
+entry](/wiki/airsonic.md#clients).
 
 ## Scrobbling with Last.fm
 

wiki/airsonic.md

@@ -17,3 +17,6 @@ The software can be setup via [Docker](/wiki/docker.md) with the
 It is possible to use many different clients because the server is compatible
 with all the Subsonic clients.
 These can be found in the [Subsonic entry](./subsonic.md#clients).
+
+Additionally to these clients there is an improved web user interface made by tamland called
+[airsonic-refix](https://github.com/tamland/airsonic-refix).