2933 compiler warning gags need better granularity
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>

PSARC/2010/043 Reliable Datagram Service v3
6850013 RDS driver upgrade to version 3
6902396 su_recv does not call pollwakeup() for zero-len datagrams when protocol uses uio recv