Add support for phases
This adds a "publish" permission level (between "init" and "write") required to
be able to change the phase of a changeset from "draft" to "public".
Update documentation accordingly.
This is meant to be used for using the changeset evolution feature of mercurial,
see http://evolution.experimentalworks.net/doc/
# WARNING: when these hooks run they will entirely destroy and rewrite
# ~/.ssh/authorized_keys
[extensions]
hgext.purge =
[hooks]
changegroup.aaaab_update = hg update -C default > /dev/null
changegroup.aaaac_purge = hg purge --all > /dev/null
changegroup.refreshauth = python:mercurialserver.refreshauth.hook