Separate out mumble. It doesn't need to depend on prosody being installed

src/freedombone-utils-web

 function update_default_domain {
     echo $'Updating default domain'
     if [[ $ONION_ONLY == 'no' ]]; then
-        if [ -d /etc/prosody ]; then
-            if [ -f /etc/mumble-server.ini ]; then
-                if [ ! -f /etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem ]; then
-                    if ! grep -q "mumble.pem" /etc/mumble-server.ini; then
-                        sed -i 's|sslCert=.*|sslCert=/var/lib/mumble-server/mumble.pem|g' /etc/mumble-server.ini
-                        sed -i 's|sslKey=.*|sslKey=/var/lib/mumble-server/mumble.key|g' /etc/mumble-server.ini
-                        systemctl restart mumble
-                    fi
-                else
-                    if ! grep -q "${DEFAULT_DOMAIN_NAME}/fullchain.pem" /etc/mumble-server.ini; then
-                        usermod -a -G ssl-cert mumble-server
-                        sed -i "s|sslCert=.*|sslCert=/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem|g" /etc/mumble-server.ini
-                        sed -i "s|sslKey=.*|sslKey=/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/privkey.pem|g" /etc/mumble-server.ini
-                        systemctl restart mumble
-                    fi
+        if [ -f /etc/mumble-server.ini ]; then
+            if [ ! -f /etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem ]; then
+                if ! grep -q "mumble.pem" /etc/mumble-server.ini; then
+                    sed -i 's|sslCert=.*|sslCert=/var/lib/mumble-server/mumble.pem|g' /etc/mumble-server.ini
+                    sed -i 's|sslKey=.*|sslKey=/var/lib/mumble-server/mumble.key|g' /etc/mumble-server.ini
+                    systemctl restart mumble
+                fi
+            else
+                if ! grep -q "${DEFAULT_DOMAIN_NAME}/fullchain.pem" /etc/mumble-server.ini; then
+                    usermod -a -G ssl-cert mumble-server
+                    sed -i "s|sslCert=.*|sslCert=/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem|g" /etc/mumble-server.ini
+                    sed -i "s|sslKey=.*|sslKey=/etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/privkey.pem|g" /etc/mumble-server.ini
+                    systemctl restart mumble
                 fi
             fi
+        fi
 
+        if [ -d /etc/prosody ]; then
             if [ ! -d /etc/prosody/certs ]; then
                 mkdir /etc/prosody/certs
             fi