Pierre-Yves David <pierre-yves.david@logilab.fr> [Fri, 24 Aug 2012 16:52:45 +0200] rev 17547
checkheads: attend to phases when computing new heads with obsolete
Checkheads was more permissive than expected. When the remote heads
are public we don't need to search for successors. None will make a
public head disappear.