dnsparse -- parses DNS responses

The standard Sockets API for doing DNS lookups is getaddrinfo() (or the
older gethostbyname()). However, this provides only basic lookups, and
is insufficient for complex tasks, such as looking up MX records.

For more complex lookups is the <resolv.h> API, with the functions
res_search() or res_query(). This can be considered an extension of
the Sockets/Winsock API.

However, while these functions take care of sending/receiving DNS packets,
they still leave the parsing of DNS records up to the programmer.

This module parses those DNS responses. The programmer simply includes
the module dns-parse.c in their project, and include the dns-parse.h
in their source.

The src directory contains many other files. These are for:

• example usage of the dns-parse.c
• unit/regression tests
• useful utilities