Can we get unitests to not run with program start ?

[Steven Schveighoffer via Digitalmars-d]

On 10/27/16 9:09 AM, Steven Schveighoffer wrote:
> On 10/26/16 1:24 AM, deadalnix wrote:
>> Seriously that makes no sense, almost everybody has it own hack to have
>> a different main when building for unitests, and we look like clown.
>>
>> We all like to talk about language feature and all, but seriously, this
>> kind of thing is what hurts us the most. We kind of live with it because
>> we all have our workaround here, but really, it looks stupid to anyone
>> that don't the tricks, and really, it should looks silly to anyone that
>> knows the trick.
>>
>> Can I have my unittest build do not complain if there is no main and not
>> run main ?
>>
>
> I'm with you 100%. This isn't even that hard, and doesn't require DMD
> changes. The runtime can exit if it runs any unit tests before calling
> main.

This was pretty easy, please review/comment:

https://github.com/dlang/druntime/pull/1685

-Steve