fail2ban service: add iproute to PATH

iproute is required for blocking via null routes; without it, rules
based on routes.conf will fail.

Closes #15638

Taeradan 77028b1e 315101ac

Changed files
+1 -1
nixos
modules
services
security
+1 -1
nixos/modules/services/security/fail2ban.nix
···
partOf = optional config.networking.firewall.enable "firewall.service";
restartTriggers = [ fail2banConf jailConf ];
-
path = [ pkgs.fail2ban pkgs.iptables ];
+
path = [ pkgs.fail2ban pkgs.iptables pkgs.iproute ];
preStart =
''