Removes dnsmessage.Parser usage

For code flow simplicity when handling data that may or may not be structured
precisely as expected it's easier to move to unpacking the whole message and
handling that as is.

config.go

@@ -46,4 +46,7 @@ type Config struct {
 
 	// Interfaces will override the interfaces used for queries and answers.
 	Interfaces []net.Interface
+
+	// Override the default behavior of echoing the query with the answer
+	DoNotEchoQueryWithAnswer bool
 }