Log Message:
net/dnscrypt-proxy2: Update to 2.0.16. Take maintainership.

Changes:

- On Unix-like systems, the server can run as an unprivileged user,
and the main process will automatically restart if an error occurs.
- pledge() on OpenBSD.
- New "offline" mode to serve queries locally without contacting any
upstream servers. This can be especially useful along with the
cloaking module for local development.
- New logo.
- TTL of OPT records is properly ignored by the caching module.
- The proxy doesn't quit any more if new TCP connections cannot be
created.