Don't use TLS time sync for mesh peers, which are typically not connected to the internet

src/freedombone

   if grep -Fxq "time_synchronisation" $COMPLETION_FILE; then
       return
   fi
+  # mesh peers typically don't sync over the internet
+  if [[ $SYSTEM_TYPE == "$VARIANT_MESH" ]]; then
+      return
+  fi
   #apt-get -y install tlsdate
 
   # building tlsdate from source is a workaround because of