New module: encrypted-dns

DNS tunneling over DNS-over-HTTPS (DoH) to `*.sandbox.alphasoc.xyz` via a random public server picked from the list below.

```
https://dns.google/dns-query
https://cloudflare-dns.com/dns-query
https://dns.quad9.net/dns-query
https://doh.opendns.com/dns-query
https://doh.powerdns.org -- shutdown planned for 15.09.2021 according to https://powerdns.org/doh/privacy.html
```
