Please backport mercurial 3.1.2-2+deb8u1build0.15.04.2 (universe) from vivid-updates

Please backport mercurial 3.1.2-2 (universe) from vivid to trusty, utopic.

Reason for the backport:
========================
1. Need 'hg config' command from 3.0+ on Trusty
2. A lots of bugs fixed
http://mercurial.selenic.com/wiki/WhatsNew

Testing:
========
Mark off items in the checklist [X] as you test them, but please leave the checklist so that backporters can quickly evaluate the state of testing.

You can test-build the backport in your PPA with backportpackage:
$ backportpackage -u ppa:<lp username>/<ppa name> -s vivid -d trusty mercurial
$ backportpackage -u ppa:<lp username>/<ppa name> -s vivid -d utopic mercurial

* trusty:
[X] Package builds without modification
[X] mercurial installs cleanly and runs
[ ] mercurial-common installs cleanly and runs
* utopic:
[ ] Package builds without modification
[ ] mercurial installs cleanly and runs
[ ] mercurial-common installs cleanly and runs

Reverse dependencies:
=====================
The following reverse-dependencies need to be tested against the new version of mercurial. For reverse-build-dependencies (-Indep), please test that the package still builds against the new mercurial. For reverse-dependencies, please test that the version of the package currently in the release still works with the new mercurial installed. Reverse- Recommends, Suggests, and Enhances don't need to be tested, and are listed for completeness-sake.

mercurial
---------
* etckeeper
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* mercurial-git
  [X] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* seekwatcher
  [ ] trusty (Reverse-Build-Depends)
  [ ] utopic (Reverse-Build-Depends)
* blogofile
  [ ] trusty (Reverse-Suggests)
  [ ] utopic (Reverse-Suggests)
* duck
  [ ] utopic (Reverse-Depends)
* gquilt
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* python3-vcversioner
  [ ] utopic (Reverse-Suggests)
* commit-patch
  [ ] trusty (Reverse-Suggests)
  [ ] utopic (Reverse-Suggests)
* buildbot
  [ ] trusty (Reverse-Suggests)
  [ ] utopic (Reverse-Suggests)
* powerline
  [ ] utopic (Reverse-Build-Depends)
* python-hglib
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
  [ ] trusty (Reverse-Build-Depends)
  [ ] utopic (Reverse-Build-Depends)
* myrepos
  [ ] trusty (Reverse-Suggests)
  [ ] utopic (Reverse-Suggests)
* git-remote-hg
  [ ] utopic (Reverse-Depends)
  [ ] utopic (Reverse-Build-Depends-Indep)
* buildbot-slave
  [ ] trusty (Reverse-Suggests)
  [ ] utopic (Reverse-Suggests)
* hobbit-plugins
  [ ] trusty (Reverse-Suggests)
  [ ] utopic (Reverse-Suggests)
* hgsvn
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* trac-mercurial
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* qct
  [ ] trusty (Reverse-Breaks)
  [ ] trusty (Reverse-Enhances)
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Breaks)
  [ ] utopic (Reverse-Enhances)
  [ ] utopic (Reverse-Depends)
* jhbuild
  [ ] trusty (Reverse-Recommends)
  [ ] utopic (Reverse-Recommends)
* gitit
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* hgview-common
  [ ] trusty (Reverse-Enhances)
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Enhances)
  [ ] utopic (Reverse-Depends)
* redmine
  [ ] trusty (Reverse-Suggests)
  [ ] utopic (Reverse-Suggests)
* mercurial-server
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* zim
  [ ] trusty (Reverse-Suggests)
  [ ] utopic (Reverse-Suggests)
* pepper
  [ ] trusty (Reverse-Recommends)
  [ ] utopic (Reverse-Recommends)
  [ ] trusty (Reverse-Build-Depends)
  [ ] utopic (Reverse-Build-Depends)
* rebar
  [ ] trusty (Reverse-Recommends)
  [ ] utopic (Reverse-Recommends)
* hg-fast-export
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* mercurial-nested
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* tailor
  [ ] trusty (Reverse-Suggests)
  [ ] trusty (Reverse-Conflicts)
  [ ] utopic (Reverse-Suggests)
  [ ] utopic (Reverse-Conflicts)
* python-rope
  [ ] trusty (Reverse-Recommends)
  [ ] utopic (Reverse-Recommends)
* eclipse-mercurialeclipse
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* hgview-curses
  [ ] trusty (Reverse-Enhances)
  [ ] utopic (Reverse-Enhances)
* ikiwiki
  [ ] trusty (Reverse-Recommends)
  [ ] utopic (Reverse-Recommends)
* etm-qt
  [ ] trusty (Reverse-Recommends)
* python-vcversioner
  [ ] utopic (Reverse-Suggests)
* tortoisehg
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* hgview
  [ ] trusty (Reverse-Enhances)
  [ ] utopic (Reverse-Enhances)
  [ ] trusty (Reverse-Build-Depends)
  [ ] utopic (Reverse-Build-Depends)
* libghc-filestore-dev
  [ ] trusty (Reverse-Recommends)
  [ ] utopic (Reverse-Recommends)
* open-font-design-toolkit
  [ ] trusty (Reverse-Recommends)
  [ ] utopic (Reverse-Recommends)
* hgsubversion
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* fdroidserver
  [ ] utopic (Reverse-Suggests)
* bugs-everywhere
  [ ] trusty (Reverse-Recommends)
  [ ] utopic (Reverse-Recommends)
  [ ] trusty (Reverse-Build-Depends-Indep)
  [ ] utopic (Reverse-Build-Depends-Indep)
* mercurial-buildpackage
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)
* mercurial-keyring
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)

mercurial-common
----------------
* mercurial-nested
  [ ] trusty (Reverse-Depends)
  [ ] utopic (Reverse-Depends)