* breakpoint.h (struct bpstat): Remove momentary field.

	* breakpoint.h (struct bpstat): Remove momentary field.
	Remove bpstat_momentary_breakpoint.  This was always kludgy
	and is no longer used.

	* breakpoint.h: Add enum bpstat_what.
	breakpoint.h (struct bpstat), breakpoint.c (bpstat_stop_status):
	stop and print fields of bpstat now per-breakpoint, not just
	one for the whole chain.
	breakpoint.{c,h} (bpstat_what): New function.
	breakpoint.h: Remove bpstat_stop and bpstat_should_print.
	infrun.c: Replace switch (stop_bpstat->breakpoint_at->type)
	with call to bpstat_what.
	README: Remove watchpoint/breakpoint bug from known bugs.

	* breakpoint.h: Prototype bpstat_find_breakpoint.