evolve: kill `--obsolete` and `--old-obsolete` flags for graft Evolve extension used to add the couple of flags to `hg graft` command for reasons I don't know but they were deprecated. For the functionality of `hg graft --old-obsolete`, we have `hg grab` now which can do that. One more reason to kill this is that we have logic to parse the graftstate, whereas in core, we are going to change how state files are read and write. Tweaked the tests a bit to use `hg grab` instead of these flags to make rest of the test output consistent. Replaced an entry of `hg graft -O` in doc by `hg grab`.

This software was downloaded from
https://www.mercurial-scm.org/repo/evolve/

Copyright 2011 Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
               Logilab SA        <contact@logilab.fr>
               Pierre-Yves David <pierre-yves.david@ens-lyon.org>
	       Patrick Mezard <patrick@mezard.eu>


This software may be used and distributed according to the terms of the GNU
General Public License version 2 or any later version.

On Debian systems, the complete text of the GNU General Public License version
2 can be found in `/usr/share/common-licenses/GPL-2'.