* remote.c: (remote_wait, remote_async_wait): Add check for awatch

    * remote.c: (remote_wait, remote_async_wait): Add check for awatch
        T-packets; the 'a' is not taken as a register number.
	(remote_check_watch_resources, remote_stopped_by_watchpoint)
        (remote_stopped_data_address): New functions; add to target
        vector.
        (remote_insert_hw_breakpoint, remote_remove_hw_breakpoint): Change
        prototypes to match other implementations of this
        function. replace integer argument with pointer -- the length
        field in the Z-packet is the length of what is pointed to or 1 if
        pointer is null. Add to target vector.
        (remote_insert_watchpoint, remote_remove_watchpoint): Add to
        target vector.

        From Mark Salter:
        * remote.c (remote_wait): Add support to extract optional
        watchpoint information from T-packet. Ignore unrecognized
        optional info in T-packet.
        (remote_async_wait): Ditto.
doc:
	From Mark Salter:
	* gdb.texinfo (Protocol): Document T packet extension to
	allow watchpoint address reporting.