Purpose: To get [TclX] file functionality into the core.

The -keepalive option should be added to [fconfigure] for sockets

A new command [pipe] should be added to provide TclX pipe functionality.

'''Changes to tcl's file command'''

A new file type result, '''tty''', will be added.

a new file option '''-fileid''' to allow an open file to be processed in place of the file name argument.  (This may not be possible under windows.)

    * '''file truncate''' for tclx's [ftruncate]
    * '''file lock''' for tclx's [flock]
    * '''file unlock''' for tclx's [funlock]
    * '''file dup''' for tclx's [dup]

----