recent "closesocket" & "socket_dup_wrap" fixes apply to "NATIVE_WIN32", only; "WIN32" is also set on CYGWIN.
recent "closesocket" & "socket_dup_wrap" fixes apply to
"NATIVE_WIN32", only; "WIN32" is also set on CYGWIN.

TODO: check/verify all usage of "WIN32", "CYGWIN32", & "NATIVE_WIN32"
      to ensure correctness & consistency ...

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb