Not only has BSD had something like BusyBox since the very beginning,^1 it has had a code-generating program to allow BSD users to create their own "busybox-like" programs.

1. 1994 for NetBSD and 1995 for OpenBSD

    (echo cd pub/OpenBSD/Changelogs/;echo get ChangeLog.0)  \
    |ftp ftp://66.111.2.37
    sed 9q ChangeLog.0
    less -p crunchgen ChangeLog.0

    (echo cd pub/OpenBSD/cvs/src/usr.sbin/crunchgen;echo get crunchgen.8,v) \
    |ftp ftp://66.111.2.37
    mandoc crunchgen.8,v|sed '1,61d;260,$d'
 

If I am missing something obvious, then I apologise for the error.

The person making this statement appears to be a BSD user.

    printf 'HEAD / HTTP/1.0\r\nHost: oclsc.org\r\nConnection: close\r\n\r\n' \
    |nc -vv oclsc.org 80 \
    |sed -n '/[Ss]erver/p' 

Server: OpenBSD httpd