Fix mesh protocol condition

src/freedombone-mesh-batman

@@ -238,7 +238,7 @@ function start {
 
     systemctl restart nginx
 
-    if [[ "$MESH_DEFAULT_PROTOCOL" == 'bmx6' ]]; then
+    if grep -q "bmx6" $MESH_DEFAULT_PROTOCOL; then
         systemctl restart bmx6
     else
         systemctl restart bmx7