Server does not need to raise exception on failed sendto(). Fixes #183.

src/network/network.cc

@@ -266,6 +266,8 @@ void Connection::send( string s )
   ssize_t bytes_sent = sendto( sock, p.data(), p.size(), 0,
 			       (sockaddr *)&remote_addr, sizeof( remote_addr ) );
 
+  if ( server ) { return; } /* No need to spin; just treat as dropped packet. */
+
   if ( bytes_sent == static_cast<ssize_t>( p.size() ) ) {
     return;
   } else {