(M32R/D): Document "sdireset", "sdistatus", "debug_chaos",

	(M32R/D): Document "sdireset", "sdistatus", "debug_chaos",
	"use_debug_dma",
	"use_mon_code", "use_ib_break", "use_dbt_break".
	(Debugging Output): Improve wording.
	(Set Breaks): Add index entry for "hardware breakpoints".
	(Renesas ICE): Document "e7000", "ftplogin", "ftpload", "drain",
	and "set/show usehardbreakpoints".
	(MIPS Embedded): Document "se/show syn-garbage-limit", "set/show
	monitor-prompt", "set/show monitor-warnings", "pmon".