Need to use the subsecond microsecond value, rather than the total
microsecond value, otherwise `select(2)` will yield EINVAL.
The wezterm changes show where this error was bubbling up
and breaking the tls client code.
This avoids a deadlock waiting for the named pipe information to be
returned if we're probing during drop(). This does make the
OwnedHandle struct slightly larger on windows.
I didn't notice that windows has separate traits for raw sockets,
so blanket impls for things that returned RawHandle's were not
applying on windows in the same way that they were on unix systems.
