Split DNS#18

I want to forward DNS requests to an upstream based on the domain requested. Let's assume an organization (mycorp.com) runs authoritative DNS servers for its own domain under dns.mycorp.com (at IP 100.100.100.100). I want to configure crab-hole so that all requests to any subdomain (as deep as necessary) of mycorp.com terminate at dns.mycorp.com, while all other requests go to Cloudflare for example. See the following example requests: www.subdomain.mycorp.com -> crab-hole uses dns.mycorp.com as Upstream test.mycorp.com -> crab-hole uses dns.mycorp.com as Upstream mycorp.com -> crab-hole uses dns.mycorp.com as Upstream google.com -> crab-hole uses another configured Upstream mail.google.com -> crab-hole uses another configured Upstream Config-wise it could look the following: ``` [upstream] [[upstream.name_servers]] socket_addr = "[2606:4700:4700::1111]:853" protocol = "tls" tls_dns_name = "1dot1dot1dot1.cloudflare-dns.com" [[upstream.name_servers]] socket_addr = "100.100.100.100:85" protocol = "udp" domains = [ "mycorp.com", "mycorp.eu" ] ```