Client update to removed all client-configured backup locations

As the topic indicates, after updating to the 2.5.x branch, once the clients got updated, all the locally configured backup locations were replaced with the default locations configured for the group on the server.

Currently I could not find a way to get them back, it seems I need to configure all of them again.

Also, at least for the linux-client, even if I set the mode to “client configuration”, the “configured on server” directories remain and trying to remove them with urbackupclientctrl remove-backupdir hangs indefinitely, until I cancel it with Ctrl-C.