Copyright for expect source package in Focal

Author: Don Libes 
Download: http://sourceforge.net/projects/expect/

Files: *
Copyright: (C) 1987-2002 National Institute of Standards and Technology 
License: PD
 Design and implementation of this program was paid for by U.S. tax
 dollars. Therefore it is public domain. However, the author and NIST
 would appreciate credit if this program or parts of it are used.

Files: debian/*
Copyright: (C) 2006-2008 Daniel Baumann 
License: PD
 The Debian packaging is hereby placed in the public domain (no rights
 reserved).