human procedures) breaking because they assume it's enough to copy
MAKEDEV fom one place to another.
Let MAKEDEV return after defining shell functions but before doing any
real work, if MAKEDEV_AS_LIBRARY is set.
Let MAKEDEV.local load MAKEDEV as a function library via
"MAKEDEV_AS_LIBRARY=1 . MAKEDEV".
use by both MAKEDEV and MAKEDEV.local. This allows MAKEDEV.local
to accept the same command line arguments as MAKEDEV.
The installed MAKEDEV.subr is generated from MAKEDEV.subr.tmpl.
Replace the licence on MAKEDEV.local with a NetBSD licence, since I
rewrote the entire file.
Reviewed by christos and agc
