have it be automatically included by bsd.pkg.mk if USE_PKGINSTALL is set
to "YES". This enforces the requirement that bsd.pkg.install.mk be
included at the end of a package Makefile. Idea suggested by Julio M.
Merino Vidal <jmmv at menta.net>.
as this isn't really the real Korn shell, and "pdksh" is a more accurate
name for it. Also don't use buildlink2 so that this shell may be used to
bootstrap buildlink2.
PD-ksh is a mostly complete AT&T ksh look-alike. Work is mostly
finished to make it fully compatible with both POSIX and AT&T ksh
(when the two don't conflict). Since pdksh is free and compiles
and runs on most common unix systems, it is very useful in creating
a consistent user interface across multiple machines.
