msgtool and shmtool are based on code from The Linux Programmer's
Guide at:

	http://www.tldp.org/LDP/lpg/

unixsockcat is based on public-domain code from:

	http://troydhanson.github.io/network/Unix_domain_sockets.html

The SimpleFlow authors wrote x11copy, x11paste, x11pipe, findconfidential,
rmconfidential, and set confidential.
