hswaw/sound: open mosquitto firewall port

Change-Id: Ie46cbe27b1d47bc0ad90bde193283f134ba767be
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1447
Reviewed-by: vuko <vuko@hackerspace.pl>
diff --git a/hswaw/machines/sound.waw.hackerspace.pl/configuration.nix b/hswaw/machines/sound.waw.hackerspace.pl/configuration.nix
index d1a9b4c..8397cae 100644
--- a/hswaw/machines/sound.waw.hackerspace.pl/configuration.nix
+++ b/hswaw/machines/sound.waw.hackerspace.pl/configuration.nix
@@ -193,6 +193,7 @@
         22 # ssh
         80 # nginx http
         1883 # mqtt (mosquitto)
+        8883 # tls mqtt (mosquitto)
         4713 # pulseaudo
     ];
   };