Partially revert 278642

On reinstall (overwrite) install(1) does not handle chflags

Reported by:	ian

usr.bin/chpass/Makefile

@@ -9,7 +9,6 @@ PROG=	chpass
 SRCS=	chpass.c edit.c field.c pw_scan.c table.c util.c
 BINOWN=	root
 BINMODE=4555
-PRECIOUSPROG=
 .if ${MK_NIS} != "no"
 CFLAGS+= -DYP
 .endif
@@ -35,4 +34,16 @@ MLINKS=	chpass.1 chfn.1 chpass.1 chsh.1
 MLINKS+= chpass.1 ypchpass.1 chpass.1 ypchfn.1 chpass.1 ypchsh.1
 .endif
 
+beforeinstall:
+.for i in chpass chfn chsh ypchpass ypchfn ypchsh
+.if exists(${DESTDIR}${BINDIR}/$i)
+	-chflags noschg ${DESTDIR}${BINDIR}/$i
+.endif
+.endfor
+
+.if !defined(NO_FSCHG)
+afterinstall:
+	-chflags schg ${DESTDIR}${BINDIR}/chpass
+.endif
+
 .include <bsd.prog.mk>