bug#1267: Emacsclient can't find terminal in daemon mode

[Chong Yidong]

Dan Nicolaescu <dann@ics.uci.edu> writes:

>   > The patch you sent won't work on a text-only terminal.
>
> Have you tried it?  It should throw an error and ask for either -t or -c 
>
>   > not, it tries X; if that fails, it falls back on using the tty
>   > specified
>
> Does "it tries X" mean it tries to create an X frame?  That won't be
> right, the user might just want to use an existing X frame.  I do that
> 100 times a day.

How about just using the tty?

Do we lose anything by making emacsclient use the tty (i.e., the same as
-t) if neither -t nor -c is specified, and the server is a daemon?