I noticed interesting problem with "Server IP Address" field in multiserver use. When "Server Services" in "System" panel Is configured to be a "mirror of Server" that slave server loses it's IP identity on "Server IP Address" field. This means that particular IP can't be used on "Sites" panel anymore which basically means that I can't assign a website the IP of the slave server. I was trying to create a site for on the new slave server that I could use for Certbot SSL but now I'm not sure if that is possible.
There is no need to assign an IP for certbot SSL. Certbot works with IP and * setting in the same way.
