bind verbose logging

[shawn wilson <ag4ve.us () gmail com>]

In this log line, what is -EDC? I've also noticed +, -, -E, and -ED
but I have no Idea what they are (called/represent).

08-May-2013 08:04:49.751 client 1.2.3.4#48747 (ns2.example.com):
query: ns2.example.com IN AAAA -EDC (1.2.3.4)

Also, I'm writing a parser and we're only loging 'queries' but if
someone has examples / schemas for the other categories, I'd like to
integrate that.
http://www.zytrax.com/books/dns/ch7/logging.html