Added a method on UDPConn so they can actually send broadcast packets.
Added a method on UDPConn so they can actually send broadcast packets.

R=rsc
http://codereview.appspot.com/162046

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go