+- Align with Mercurial version 2.3 (drop 2.2 support).
+- stabilize handle killed parent
+- stabilize handle late comer
+- stabilize get a --continue switch
+- merge and update ignore extinct changeset in most case.
+- new "troubled()" revset
+- rebase refuse to work on public changeset again
+- rebase explicitly state that there is nothing to rebase because everything is
+ extinct() when that happen.
+- amend now cleanly abort when --change switch is misused
- hook: work around insanely huge value in obsolete pushkey call