Log Message:
net/dnscrypt-proxy2: Update to 2.0.21.

* Startup is now way faster, especially when using DoH servers.
* A new action: CLOAK is logged when queries are being cloaked.
* A cloaking rule can now map to multiple IPv4 and IPv6 addresses, with \ 
load-balancing.
* New option: refused_code_in_responses to return (or not) a REFUSED code on \ 
blacklisted queries. This is disabled by default, in order to work around a bug \ 
in Android Pie.
* Time-based restrictions are now properly handled in the \ 
generate-domains-blacklist.py script.
* Other improvements have been made to the generate-domains-blacklist.py script.
* The Windows service is now installed as NT AUTHORITY\NetworkService.