Exit with return code if ftl does not start

Signed-off-by: Dan Schaper <dan.schaper@pi-hole.net>

advanced/Templates/pihole-FTL.service

@@ -58,10 +58,10 @@ start() {
     fi
 
     if setcap CAP_NET_BIND_SERVICE,CAP_NET_RAW,CAP_NET_ADMIN,CAP_SYS_NICE,CAP_IPC_LOCK,CAP_CHOWN+eip "/usr/bin/pihole-FTL"; then
-      su -s /bin/sh -c "/usr/bin/pihole-FTL" pihole
+      su -s /bin/sh -c "/usr/bin/pihole-FTL" pihole || exit $?
     else
       echo "Warning: Starting pihole-FTL as root because setting capabilities is not supported on this system"
-      /usr/bin/pihole-FTL
+      /usr/bin/pihole-FTL || exit $?
     fi
     echo
   fi