Now that the site has been tagged as enabled for Zscaler, we need to tag the
circuit categories that can be used to establish a Standard VPN or GRE tunnel to
Zscaler.
This capability is useful if you want only specific types of circuits to be
used for Zscaler integration or explicitly exclude certain circuit types.
For example, a customer may not want to use their metered LTE circuit for
Standard VPN establishment.