Allow to manage more than one AdGuard from Integrations

As it’s a good idea to have more than one DNS server, I’ve added a second AdGuard in my network, just running on a RPi 1 (or two, can’t remember). So on top of the add-on version adguard, I have a second one, so no matter what is restarted a DNS server is available.
It is possible to add adguard via integrations, so it would be possible to have the extra adguard controllable from within HA.
Currently the integration only allows one adguard, so it would nice to have way to have two integrations, so that the external as well as the addon can be managed through HA.

+1, would be really useful to use HA to command both instances of Adguard at the same time