* frame.c (frame_unwind_id): Renamed to ...

	* frame.c (frame_unwind_id): Renamed to ...
	(frame_unwind_caller_id): ... this.  All callers updated.
	(frame_pc_unwind): Renamed to ...
	(frame_unwind_caller_pc): ... this.  All callers updated.
	* frame.h: Document frame_unwind_caller_WHAT functions.
	(frame_unwind_id): Renamed to ...
	(frame_unwind_caller_id): ... this.
	(frame_pc_unwind): Renamed to ...
	(frame_unwind_caller_pc): ... this.
	* hppa-tdep.c (hppa_find_unwind_entry_in_block): Correct comment.
	* stack.c (parse_frame_specification_1): Do not rely on
	frame_unwind_id.