Contribution checklist v2

[Florian Weimer]

* Siddhesh Poyarekar:

> On 08/10/19 5:31 pm, Florian Weimer wrote:
>> I think we need to fix some whitespace issues first:
>> 
>>   <https://sourceware.org/ml/libc-alpha/2019-10/msg00132.html>
>> 
>> At least my local commit hook rejected the move without that change.
>
> Those are obvious, please feel free to push them directly.

Thanks.

> However it looks like with Joseph's comment, we're back to maintaining
> ChangeLog until the end of the release since that's the point of a clean
> break.  I don't have a strong opinion about it.

This is not how I read them.  I started a new thread for the ChangeLog
move.  We can discuss it there:

  <https://sourceware.org/ml/libc-alpha/2019-10/msg00235.html>

Thanks,
Florian