addset: fix `first` and `last` on sorted addset (issue4426) The lazy sorting were not enforced on addset. This was made visible through MQ.

clone: properly mark branches closed with --uncompressed (issue4428) On streaming clone, we were priming the local branch cache with the remote branchmap, without checking which heads were closed. This fixes an issue introduced in: changeset: 17740:e6067bec18da user: Tomasz Kleczek <tomasz.kleczek@fb.com> date: Wed Oct 03 13:19:53 2012 -0700 summary: branchcache: fetch source branchcache during clone (issue3378) that was exposed in 2.9 by: changeset: 20192:38fad5e76ee8 user: Brodie Rao <brodie@sf.io> date: Mon Sep 16 01:08:29 2013 -0700 summary: branches: simplify with repo.branchmap().iterbranches()