Fix mumble certs

src/freedombone-utils-web

                 cp /etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.dhparam /var/lib/mumble-server/mumble.dhparam
                 cp /etc/ssl/private/${DEFAULT_DOMAIN_NAME}.key /var/lib/mumble-server/mumble.key
                 chown -R mumble-server:mumble-server /var/lib/mumble-server
-                chmod -R 700 /var/lib/mumble-server/${DEFAULT_DOMAIN_NAME}.pem
-                chmod -R 700 /var/lib/mumble-server/${DEFAULT_DOMAIN_NAME}.key
-                chmod -R 700 /var/lib/mumble-server/${DEFAULT_DOMAIN_NAME}.dhparam
-                systemctl reload mumble
+                chmod -R 700 /var/lib/mumble-server/*.pem
+                chmod -R 700 /var/lib/mumble-server/*.key
+                chmod -R 700 /var/lib/mumble-server/*.dhparam
+                systemctl reload mumble-server
             fi
         fi