X-Git-Url: https://git.distorted.org.uk/~mdw/secnet/blobdiff_plain/93cdea57befc5f3ba37a087f827bf02f5768a4a5..2f9fa75f101edc385b91a074f3dc21b8ec41bf79:/README

diff --git a/README b/README
index fd3d31f..414baee 100644
--- a/README
+++ b/README
@@ -194,8 +194,11 @@ Defines:
   udp (closure => comm closure)
 
 udp: dict argument
-  address (string list): IPv6 or IPv4 addresses to listen and send on
-  port (integer): UDP port to listen and send on
+  address (string list): IPv6 or IPv4 addresses to listen and send on;
+   default is all local addresses
+  port (integer): UDP port to listen and send on; optional if you
+   don't need to have a stable address for your peers to talk to
+   (in which case your site ought probably to have `local-mobile true').
   buffer (buffer closure): buffer for incoming packets
   authbind (string): optional, path to authbind-helper program