No longer blocks for an extra keypress at termination on *nix.  Something
like raw_poll or something will be needed to let Win32 work (and to avoid
the silly socket_select(file) usage).

needs to load its own input script, give unique global names to the different
input queues.

after each write so we don't require the -f option.

jsexec_console and socket_console to avoid copy pasta.

Use 0/0 origin for all things.  Just because ANSI uses 1/1 origin doesn't
mean we have to.

file.

select() a file on that OS.  Also, opening the "CON" file may not do what
I expect.

the local and remote I/O into a single queue which can be waited on.

A *very* simple door now "works".