Message4692

This is intentional as Java doesn't provide us direct access to real int 
fds

Emulating them as ints is possible but doesn't seem worth the effort, at 
least for the moment. The only real apparent issue is the std 
descriptors 0/1/2 are sometimes passed around. We've fixed os.isatty to 
recognize them and handle them appropriately, but some other functions 
may need similar workarounds

Does our current implementation actually break anything? All the related 
stdlib tests should be passing. If so, please reopen this and provide a 
specific use case (preferably a test)