pfctl_set_interface_flags
errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0);
errs += pfctl_set_interface_flags(pf,
pfctl_set_interface_flags(pf, n->ifname, flags, how);
pfctl_set_interface_flags(pf, p->pfik_name, PFI_IFLAG_SKIP, 0);
pfctl_set_interface_flags(pf,
pfctl_set_interface_flags(pf, p->pfik_name, PFI_IFLAG_SKIP, 0);
int pfctl_set_interface_flags(struct pfctl *, char *, int, int);