Version 2.0, 2014-04-27
=======================
* Added IPv6 support
* Replaced regex with 'hints' scanner (2x to 10x faster on some platforms)
* IP text now require strict termination, avoids matching reverse DNS
* Now complains about bad pattern formats instead of silently ignoring
* Supports multiple file names on command line, like regular grep
* Updated Makefile to be FreeBSD-friendly; also now includes -O3
* Fixed invert (-v) logic and added -i to include lines without an IP
* Now supports unlimited line length within input stream/file
* Added -s option to enforce strict alignment of CIDR mask
* Fixed bug, now recognizes /0 and 0.0.0.0


Version 1.4, 2013-11-20
=======================
* Default behaviour in 1.4 has changed to search anywhere on line
* Includes regex to search anywhere on line (based on Jeff Makey's patch)
* Added -x option to search without regex, old-style strict (faster)
* Makefile and packaging update rollup, courtesy Ryan Finnie <ryan@finnie.org>
* Adopted DocBook man format, contributed by Ryan Finnie <ryan@finnie.org>
* Enhanced documentation and manual page
* Increased maximum line length to 1024 bytes


Version 1.3, 2005-04-23
=======================
* Much faster than past versions due to binary search of patterns
* Decreased memory usage
* Applied search improvements suggested by Dick Wesseling <ftu@fi.uu.nl>
* Now supports IP ranges as well as CIDR format
* Improved usage to be more grep-like (e.g. filename on command line)
* Now uses grep-like exit code (0=ok, 1=no match, 2=error)


Version 1.2, 2004-04-23
=======================
* Improved algorithm for faster processing with large number of patterns
  (approx. 50 times as fast on test set, with specs from diverse regions)


version 1.1, 2004-02-16
=======================
* New algorithm has increased speed by about 2.4 times!
* Added -c (count) option, like grep
* Reduced memory usage in case loading large files (-f)
* Added simple Makefile


version 1.0, 2004-02-14
=======================
* First public release
