Draft of Git Rev News edition 9

Hi,

A draft of Git Rev News edition 9 is available here:

https://github.com/git/git.github.io/blob/master/rev_news/drafts/edition-9.md

Everyone is welcome to contribute in any section either by editing the
above page on GitHub and sending a pull request, or by commenting on
this GitHub issue:

https://github.com/git/git.github.io/issues/108

You can also reply to this email.

I tried to cc everyone who appears in this edition but maybe I missed
some people, sorry about that.

Thomas, Nicola and myself plan to publish this edition on Wednesday
the 11th of November.

Thanks,
Christian.