[Issue 14367] Print warnings by default

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14367

--- Comment #4 from bearophile_hugs at eml.cc ---
(In reply to Martin Krejcirik from comment #3)

> Since -dw is turned on by default, there is no need for -wi by default too.

I'd like warnings by default, regardless what the compiler does regarding
deprecated features.

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