DJB has placed certain of his software in the public domain. Excerpted
from <URL:http://cr.yp.to/distributors.html>:

  What are the distribution terms for dot-forward?

  2008.06.01: I hereby place the dot-forward package (in particular,
  dot-forward-0.71.tar.gz, with MD5 checksum
  1fefd9760e4706491fb31c7511d69bed) into the public domain. The
  package is no longer copyrighted.

  What are the distribution terms for ezmlm?

  2008.06.01: I hereby place the ezmlm package (in particular,
  ezmlm-0.53.tar.gz, with MD5 checksum 108c632caaa8cdbfd3041e6c449191b2)
  into the public domain. The package is no longer copyrighted.

  What are the distribution terms for fastforward?

  2008.06.01: I hereby place the fastforward package (in particular,
  fastforward-0.51.tar.gz, with MD5 checksum
  6dc619180ba9726380dc1047e45a1d8d) into the public domain. The
  package is no longer copyrighted.

Set DJB_RESTRICTED=no in these packages (and in ezmlm-idx, by
extension). Add commented-out LICENSE=public-domain. As usual,
pkgsrc will strive to keep modifications to a tasteful minimum.

(schmonz)