Log Message:
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 daemontools?

  2007.12.28: I hereby place the daemontools package (in particular,
  daemontools-0.76.tar.gz, with MD5 checksum
  1871af2453d6e464034968a0fbcb2bfc) into the public domain. The
  package is no longer copyrighted.

  What are the distribution terms for djbdns?

  2007.12.28: I hereby place the djbdns package (in particular,
  djbdns-1.05.tar.gz, with MD5 checksum 3147c5cd56832aa3b41955c7a51cbeb2)
  into the public domain. The package is no longer copyrighted.

  What are the distribution terms for ucspi-tcp?

  2007.12.28: I hereby place the ucspi-tcp package (in particular,
  ucspi-tcp-0.88.tar.gz, with MD5 checksum
  39b619147db54687c4a583a7a94c9163) into the public domain. The
  package is no longer copyrighted.

  Am I free to modify uncopyrighted packages and distribute modified
  versions?

  Yes. But this does not mean that modifications are _encouraged_!

And from <URL:http://cr.yp.to/qmail/dist.html>:

  I hereby place the qmail package (in particular, qmail-1.03.tar.gz,
  with MD5 checksum 622f65f982e380dbe86e6574f3abcb7c) into the
  public domain. You are free to modify the package, distribute
  modified versions, etc.

  This does not mean that modifications are encouraged!

pkgsrc will strive, as it has, to keep modifications to a tasteful
minimum. This addresses PR pkg/37964 by Aleksej Saushev.