net: Add option to set outgoing multicast TTL

Signed-off-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/HOWTO b/HOWTO
index 38eafdd..a2de470 100644
--- a/HOWTO
+++ b/HOWTO
@@ -1448,6 +1448,10 @@
 [net] interface=str  The IP address of the network interface used to send or
 		receive UDP multicast
 
+[netsplice] ttl=int
+[net] ttl=int	Time-to-live value for outgoing UDP multicast packets.
+		Default: 1
+
 [netsplice] nodelay=bool
 [net] nodelay=bool	Set TCP_NODELAY on TCP connections.