V0.2.7 12/10/2002
- Print out the command to run to clean out old dns cache info.


V0.2.6 9/11/2002
- Check to see if /dev/fd exists - warn if not and give user the symlink fix.


V0.2.5 9/11/2002
- Change >/dev/stderr and >>/dev/stderr to >&2


V0.2.4 8/18/2002
- added "+norecursive" to the flags so we ask the actual target server
  what it knows, not what it can get from other servers.  Thanks again,
  Johannes.


V0.2.3 8/14/2002
- Raised number of retries to 10.
- force all info to lowercase during compare.


V0.2.2 8/8/2002
- Turn off the additional records; they sometimes come back and
  sometimes don't, so it looks like the zone is changing.  Many thanks
  to Johannes Ullrich for his help tracking this one down.


V0.2.1 8/8/2002
- use uniq to remove duplicates.


V0.2 8/7/2002
- Now supports an optional 4th column of Tsig key to allow authenticated  
  zone transfer.
- Will retry up to 3 times in case first connection unsuccessful.
- Persistent data files now stored unsorted.
- Example line for calling from cron
- Changes now displayed in unified diff ("-" refers to stored, "+"
  refers to what's pulled down from server.
- documentation
- usage help with "-h".


V0.1 8/5/2002
- First functional release
- Can test for A, MX, and SOA records (others too)
- Command line options for config file (holds dns_server, dns_object,
  object_type tuples
- AXFR zone transfer type not working with servers that need a key.