A simple DNS proxy server that supports all existing DNS protocols
including DNS-over-TLS, DNS-over-HTTPS, DNSCrypt, and DNS-over-QUIC.
Moreover, it can work as a DNS-over-HTTPS, DNS-over-TLS or
DNS-over-QUIC server.

For documents, see https://github.com/AdguardTeam/dnsproxy.

Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>