net/ipv4: add new sysctls

drop_unicast_in_l2_multicast and drop_gratuitous_arp appeared in MS:

commit 12b74dfadb5a ("ipv4: add option to drop unicast encapsulated in
L2 multicast")
commit 97daf3314550 ("ipv4: add option to drop gratuitous ARP packets")
Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/net.c

@@ -90,6 +90,8 @@ static char *devconfs[] = {
 	"src_valid_mark",
 	"tag",
 	"ignore_routes_with_linkdown",
+	"drop_gratuitous_arp",
+	"drop_unicast_in_l2_multicast",
 };
 
 /*

test/zdtm/static/netns-dev.c

@@ -19,6 +19,8 @@ char *devconfs[] = {
 	"bootp_relay",
 	"disable_policy",
 	"disable_xfrm",
+	"drop_gratuitous_arp",
+	"drop_unicast_in_l2_multicast",
 	"force_igmp_version",
 	"forwarding",
 	"igmpv2_unsolicited_report_interval",
@@ -52,6 +54,8 @@ int rand_limit[] = {
 	2,	/* bootp_relay */
 	2,	/* disable_policy */
 	2,	/* disable_xfrm */
+	2,	/* drop_gratuitous_arp */
+	2,	/* drop_unicast_in_l2_multicast */
 	0,	/* force_igmp_version */
 	2,	/* forwarding */
 	0,	/* igmpv2_unsolicited_report_interval */