re PR middle-end/86095 (documentation for -Wunsafe-loop-optimizations references options which have no effect any more)

	PR middle-end/86095
	* common.opt (Wunsafe-loop-optimizations): Add Ignore, remove Var,
	documented as preserved for backward compatibility only.
	* doc/invoke.texi: Remove -Wunsafe-loop-optimizations documentation.

From-SVN: r261679