Include pubsub

src/freedombone-app-xmpp

 function xmpp_modules {
     filename=$1
     echo 'modules_enabled = {' >> $filename
+    echo '  "pubsub";' >> $filename
     echo '  "dialback"; -- s2s dialback support' >> $filename
     echo '  "disco"; -- Service discovery' >> $filename
     echo '  "private"; -- Private XML storage (for room bookmarks, etc.)' >> $filename