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".