resolvconf(8) now needs an additional @RESTARTCMD@ replacement when installing.

After r303062, which brought openresolv 3.8.1, we need to replace an
additional @RESTARTCMD@ in resolvconf.

Reported by:	Guy Yur
X-MFC with:	r303062

sbin/resolvconf/Makefile

@@ -30,6 +30,7 @@ ${f}:	${f}.in
 		-e 's:@LIBEXECDIR@:${FILESDIR}:g' \
 		-e 's:@VARDIR@:${VARDIR}:g' \
 		-e 's:@RESTARTCMD \(.*\)@:${RESTARTCMD}:g' \
+		-e 's:@RESTARTCMD@:${RESTARTCMD_}:g' \
 		-e 's:@RCDIR@:${RCDIR}:g' \
 		-e 's: vpn : ng[0-9]*&:g' \
 		${DIST}/$@.in > $@