* remote.c (remote_get_threadinfo) : Support for remote

  * remote.c (remote_get_threadinfo) : Support for remote
        multithread debugging.
        (remote_get_threadlist) : get a partial list of threads
        (remote_threadlist_iterator) : Step through all the threads
        (init_remote_threadtests) : Optional builtin unit test commands.

        * thread.c (bind_target_thread_vector) : Implementa a more dynamic
        way of accessing target specific thread info functions than
        FIND_NEW_THREADS.
        (target_thread_info) : Function to get extended thread information.

        * gdbthread.h : Export internal data structures corresponding to
        external detailed thread info response. This is more like a 'ps'
        command than what might be expected of host based threads. This
        is for embedded systems.