RFC 2131 says we should do that.
Evidently, since for so many years no one complained, sending them broadcast
works too, but finally we've got someone who wants RFC-compliand behavior.
function old new delta
send_packet 141 179 +38
.rodata 105680 105681 +1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 39/0) Total: 39 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>