nslint is a lint-like program that checks DNS
files for errors. DNS or Domain Name System
generally maps names to IP addresses and E-mail
addresses in a hierarchical fashion. Errors
detected include missing trailing dots, illegal
characters (RFC 1034), records without matching
PTR records and vice-versa, duplicate names in a
subnet, duplicate names for an address, names with
cname records (RFC 1033), missing quotes, and
unknown keywords.
