news from the topic experiment

[Jun Wu]

Excerpts from Sean Farley's message of 2016-09-22 17:30:34 -0700:
> Completely false. Take a look at the hgtopics repo:
> 
> $ hg log --debug -vr 093a | grep "\(topic=\|phase\)"
> phase:       public
> extra:       topic=stackheader

I admit I didn't look into the details carefully. Sorry for that.

I think the major difference is the "local" vs "global" part. I do think
having the ability to give changesets private labels locally can be useful -
that's probably another extension other than "topic".