Patches from mainline to archer

[Tom Tromey]

Roland> As a general rule it seems wise to have topic branches fork
Roland> from upstream directly whenever possible.  Then "archer" can
Roland> be a merge of all those.  That way, each topic branch is ready
Roland> to go back upstream without manually separating its work from
Roland> the "archer" soup.

Thiago> For me it's the best option, FWIW.

I updated the branch management wiki page.

thanks,
Tom