This is a Debian prepackaged version of the filters package.

This package was put together and debianized by Joey Hess
<joeyh@debian.org>, using sources from
	http://qz.to/~eli/src.html and
	ftp://ftp.funet.fi/pub/misc/old-hsu-archive/unsorted/2/kraut.shar.gz

The jethro filter has this copyright:
 **   Public domain. Use at your own risk. Y'all come back now, heah?

The kraut filter has this copyright:
/* Kraut v0.9  */
/*     by      */
/* John Sparks */
/*  5-5-1989   */

/* This is in the public domain. Do with it as you will. *\

Everything else is copyright 1999 by Joey Hess, under the terms of GPL.