Document GitLab as the only way to contribute to Samba?

[Christof Schmitt]

On Fri, Jun 21, 2019 at 01:58:10PM +1200, Andrew Bartlett via samba-technical wrote:
> Christof,
> 
> You are the other person I still using samba-technical much at all to
> submit patches.  Is there anything I can do to help you make the move
> to GitLab, or is there anything stopping you?
> 
> Thanks,
> 
> Andrew Bartlett
> 
> [1] Attached is the histogram of patches on samba-technical from April
> -> June, for the curious.  

Hi Andrew,

i might have been slow in adapting to gitlab, but my last patches went
only through gitlab. The quicker feedback on the autobuild results and
the verification across different Linux distributions is very helpful.
Right now i don't see a reason not to use gitlab.

Christof