src: convert code to use new socket portability wrappers

src: convert code to use new socket portability wrappers

Convert to use socket wrappers. Aside from the header file
include change, this requires changing close -> closesocket
since our portability isn't trying to replace the close
function.

Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>