Package parser is a package for parsing massdns output
format. Massdns writes output in a dig style format
containing complete information about the resolved names.
Only a subset of information, more specifically Name and
IP address is parsed from the output. It correctly handles
CNAME record entries outputting the first name and the subsequent
A records. NS records are ignored in the current implementation.
Callback is a callback function that is called by
the parser returning the results found.
NOTE: Callbacks are not thread safe and are blocking in nature
and should be used as such.