The "open" bit is a convention ... as in openssh and opensmtpd[1]. Having a BSD licensed version of something allows that something to be included and maintaine

The "open" bit is a convention ... as in openssh and opensmtpd[1]. Having a BSD licensed version of something allows that something to be included and maintained with BSD OS distributions, OpenBSD in particular. [1] https://en.wikipedia.org/wiki/OpenBSD#Subprojects https://en.wikipedia.org/wiki/OpenBSD#Subprojects