${PKGDIR}/INSTALL -> ${PKGINSTALL}. Also, give the requisite two

arguments to ${PKGINSTALL}.  (I suspect this install script actually
working without the second argument is because of this Makefile, but I
won't touch the script itself.)

mail/nmh/Makefile

@@ -94,7 +94,7 @@ MLINKS=	mh-profile.5 mh_profile.5
 MAN8=	ap.8 conflict.8 dp.8 fmtdump.8 install-mh.8 mh-mts.8 post.8
 
 post-install:
-	@PKG_PREFIX='${PREFIX}' ${SH} ${PKGDIR}/INSTALL
+	@PKG_PREFIX='${PREFIX}' ${SH} ${PKGINSTALL} ${PKGNAME} POST-INSTALL
 	chgrp mail ${PREFIX}/bin/inc
 	${CHMOD} g+s ${PREFIX}/bin/inc