sbindir is required in the PATH of _updown

src/_updown/Makefile.am

@@ -5,6 +5,7 @@ EXTRA_DIST = _updown.in
 
 _updown : _updown.in
 	sed \
+	-e "s:@IPSEC_SBINDIR@:$(sbindir):" \
 	-e "s:\@IPSEC_ROUTING_TABLE\@:$(IPSEC_ROUTING_TABLE):" \
 	-e "s:\@IPSEC_ROUTING_TABLE_PRIO\@:$(IPSEC_ROUTING_TABLE_PRIO):" \
 	$< > $@

src/_updown/_updown.in

@@ -119,7 +119,7 @@
 #
 
 # define a minimum PATH environment in case it is not set
-PATH="/sbin:/bin:/usr/sbin:/usr/bin"
+PATH="/sbin:/bin:/usr/sbin:/usr/bin:@IPSEC_SBINDIR@"
 export PATH
 
 # uncomment to log VPN connections