Log Message:
dnscrypt-proxy2: Update to 2.0.40

* Version 2.0.40
 - Servers blocking fragmented queries are now automatically detected.
 - The server name is now only present in query logs when an actual
upstream servers was required to resolve a query.
 - TLS client authentication has been added for DoH.
 - The Firefox plugin is now skipped for connections coming from the
local DoH server.
 - DoH RTT computation is now more accurate, especially when CDNs are
in the middle.
 - The forwarding plugin is now more reliable, and handles retries over
 TCP.