Martin von Zweigbergk <martinvonz@google.com> [Fri, 08 Jan 2016 21:13:06 -0800] rev 27734
treemanifests: set bundle2 part parameter indicating treemanifest
By adding a mandatory 'treemanifest' parameter in the bundle2 part, we
make it possible for the recipient to set repo requirements before the
manifest revlog is accessed.