Please add reply-log

[raatti]

Many times pdns-logs don't really help quickly in debugging and require tcpdump and other traffic analysis tools to debug simple problems:

Remote x.x.x.x wants 'www.foo.bar|A', do = 0, bufsize = 512: packetcache HIT

This tells that client will get the info from packetcache, yet it doesn't show what is replied to client.
My suggestion: add reply-log to log something like:

Replied to remote x.x.x.x: 'www.foo.bar|A|127.0.0.1'

this way its easier and much faster to see what client asked for and what is the reply it receives.
This also helps to see if one client is receiving too much (large?) replies.

[Habbie]

We have protobuf logging in rec and dnsdist now. If somebody does protobuf support for auth, this usecase is covered, right?