[PATCH] Add control variable for debug output to linux threads

[Andrew Cagney]

Michael Snyder wrote:

> +   add_show_from_set (add_set_cmd ("debug-linux-threads", class_support,
> +                                 var_boolean, (char *) &debug_linux_threads,
> +                                 "Set debug output for linux-threads \
> + on or off.\nUse \"on\" to enable, \"off\" to disable.", &setlist),
> +                    &showlist);

FYI,

All debug variables now hang off the ``set debug ...'' command.  See
``set debug remote'' for how to correctly do this.

	Andrew