[Ecls-list] Closing BSD-SOCKET when a stream has been created

[Goffioul Michael]

> The point is that the two-way stream is the only place where 
> the sockets 
> streams themselves are referenced. This means that whenever 
> the two-way 
> stream is garbage collected, the components will also be marked as 
> unreferenced and their associated streams closed. And as far as I can 
> tell, closing a FILE stream which was opened via fdopen() will also 
> close the file handled that was open with the bsd socket routines.

I may also add that socket-close checks the closing status and
report any error, while the closing-through-GC does not.

Michael.