2011-09-27  Robert Dewar  <dewar@adacore.com>

	* a-comutr.ads: Minor reformatting.

2011-09-27  Ed Schonberg  <schonberg@adacore.com>

	* a-cimutr.adb, a-cimutr.ads, a-cbmutr.adb, a-cbmutr.ads: Add children
	iterators to multiway trees.

2011-09-27  Yannick Moy  <moy@adacore.com>

	* debug.adb (d.D): New option for strict Alfa mode.
	* opt.ads (Strict_Alfa_Mode): New flag to interpret compiler
	permissions as strictly as possible.
	* sem_ch3.adb (Signed_Integer_Type_Declaration): In non-strict
	Alfa mode, now, interpret ranges of base types like GNAT does; in
	strict mode, simply change the range of the implicit base Itype.
	* gnat1drv.adb: Update comments. Set Strict_Alfa_Mode.

From-SVN: r179258