libxt_recent: do allow --rttl for --update

Tony Ho noticed a too-strict check in xt_recent, so here is a fix.

Reported-by: Tony Ho <iptables@iblink.com.cn>
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
2 files changed