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

6638292 fix LDLIBS in nc to append, not assign

PSARC/2007/389 Netcat In Solaris
4664622 Solaris needs netcat