vxlan: fix help and man text

Options 'group' and 'remote' cannot take 'any' as value but 'local' can.
Signed-off-by: Thomas Faivre <thomas.faivre@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>

ip/iplink_vxlan.c

@@ -23,7 +23,7 @@
 
 static void print_explain(FILE *f)
 {
-	fprintf(f, "Usage: ... vxlan id VNI [ { group | remote } ADDR ] [ local ADDR ]\n");
+	fprintf(f, "Usage: ... vxlan id VNI [ { group | remote } IP_ADDRESS ] [ local ADDR ]\n");
 	fprintf(f, "                 [ ttl TTL ] [ tos TOS ] [ dev PHYS_DEV ]\n");
 	fprintf(f, "                 [ dstport PORT ] [ srcport MIN MAX ]\n");
 	fprintf(f, "                 [ [no]learning ] [ [no]proxy ] [ [no]rsc ]\n");

man/man8/ip-link.8.in

@@ -391,7 +391,8 @@ the following additional arguments are supported:
 .RB " ] [ { " group " | " remote " } "
 .I IPADDR
 .R " ] [ "
-.BI local " IPADDR "
+.B local
+.RI "{ "IPADDR " | "any " } "
 .R " ] [ "
 .BI ttl " TTL "
 .R " ] [ "