Log Message:
Update nslint to version 3.1.

Changelog:

v3.1 Sat Sep 11 12:03:58 PDT 2010

- Don't complain about missing dots for ip6.arpa ptr's

- Update default location of named.conf

- Fix Makefile.in to honor the CFLAGS environment variable when
  configure is run

v3.0 Fri Mar  5 20:13:17 PST 2010

- Add IPv6 support.

v2.2 Fri Mar 13 22:29:52 PDT 2009

- Convert source tree to subversion