Building 4.1.0 with USE_SOCKETS on Solaris 10 x86

[sthaug at nethelp.no]

> I am getting some weird errors trying to build dhcp 4.1.0 on Solaris 10 x86. The stock build does not work reliably, even with the "snoop" workaround. So building with USE_SOCKETS is the last chance.

Known bug, see for instance 

https://lists.isc.org/pipermail/dhcp-users/2008-December/007636.html

and the followup from David Hankins. No solution yet, unfortunately. I
started to work on this but got tied up in other projects.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no