[Issue 12550] Deprecate -noboundscheck and replace with more useful -boundscheck= option

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=12550

--- Comment #11 from Steven Schveighoffer <schveiguy at yahoo.com> ---
(In reply to Benjamin Thaut from comment #9)
> Please consider that you will scare of useres that care for maximum
> performance (gaming, embended) if a noboundscheck does not turn off all
> bounds checks.

Don't use @safe for tuned code.

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