How BSD Authentication Works

Would be great to specify that this covers specifically OpenBSD. First sentence of the article:

> The way OpenBSD authenticates users is quite different from other Unix-like operating systems. Most other systems like AIX, Solaris, Linux, the other BSDs, and MacOS, use a framework called Pluggable Authentication Module (PAM).

OpenBSD does some things very differently, and whether you like the way they do things may be a matter of taste. However, when the OpenBSD people do something different, it’s usually carefully reasoned, cleanly implemented, or at least thought provoking.

BSD Auth is awesome, but if anyone wants PAM, it's available as a port: https://openports.se/security/openpam