histedit: proper phase conservation (issue3724) Before this changeset, histedit created all new changesets according phases.new-commit option without any regards for the phases of the original changesets. This changeset fix that using the phase of rewritten changeset to decide the phase of the resulting changeset. In case of reordering or folding, we keep secret item secret as it seems the safer path. temporary commit creation are not affected. They are head only and stripped at the end of the histedit. As for the resolution of issue3681 (obsolescence cycle prevention), we do not handle changesets created by edit command.