[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 #10 from Brad Anderson <eco at gnuk.net> ---
Forgot to post a link to the pull request.

https://github.com/D-Programming-Language/dmd/pull/3443

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