[Issue 9683] RDMD: Emit error on missing or unexpected main function

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=9683

RazvanN <razvan.nitu1305 at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |razvan.nitu1305 at gmail.com
          Component|dmd                         |tools

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