subst.sh: add support for SBINDIR

src/scripts/tools/subst.sh

@@ -35,6 +35,7 @@ LIBDIR=
 LIBEXECDIR=
 MANDIR=
 PROGNAME="subst.sh"
+SBINDIR=
 SYSCONFDIR=
 #executables
 CHMOD="chmod"
@@ -85,6 +86,7 @@ _subst()
 		SYSCONFDIR="$PREFIX/etc"
 		[ "$PREFIX" = "/usr" ] && SYSCONFDIR="/etc"
 	fi
+	[ -z "$SBINDIR" ] && SBINDIR="$PREFIX/sbin"
 
 	while [ $# -gt 0 ]; do
 		target="$1"
@@ -127,6 +129,7 @@ _subst()
 			-e "s;@LIBEXECDIR@;$LIBEXECDIR;g" \
 			-e "s;@MANDIR@;$MANDIR;g" \
 			-e "s;@PWD@;$PWD;g" \
+			-e "s;@SBINDIR@;$SBINDIR;g" \
 			-e "s;@SYSCONFDIR@;$SYSCONFDIR;g" \
 			-- "$source" > "$target"
 		if [ $? -ne 0 ]; then