ip/vxlan: add a help for ageing and maxaddress options

These options were missing in usage and man pages.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>

ip/iplink_vxlan.c

@@ -28,6 +28,7 @@ static void explain(void)
 	fprintf(stderr, "                 [ dstport PORT ] [ srcport MIN MAX ]\n");
 	fprintf(stderr, "                 [ [no]learning ] [ [no]proxy ] [ [no]rsc ]\n");
 	fprintf(stderr, "                 [ [no]l2miss ] [ [no]l3miss ]\n");
+	fprintf(stderr, "                 [ ageing SECONDS ] [ maxaddress NUMBER ]\n");
 	fprintf(stderr, "\n");
 	fprintf(stderr, "Where: VNI := 0-16777215\n");
 	fprintf(stderr, "       ADDR := { IP_ADDRESS | any }\n");

man/man8/ip-link.8.in

@@ -262,6 +262,10 @@ the following additional arguments are supported:
 .I "[no]l2miss "
 .R " ] [ "
 .I "[no]l3miss "
+.R " ] [ "
+.BI ageing " SECONDS "
+.R " ] [ "
+.BI maxaddress " NUMBER "
 .R " ]"
 
 .in +8
@@ -326,6 +330,14 @@ are entered into the VXLAN device forwarding database.
 .I [no]l3miss
 - specifies if netlink IP ADDR miss notifications are generated.
 
+.sp
+.BI ageing " SECONDS"
+- specifies the lifetime in seconds of FDB entries learnt by the kernel.
+
+.sp
+.BI maxaddress " NUMBER"
+- specifies the maximum number of FDB entries.
+
 .in -8
 
 .TP