Please merge lvm2 2.03.11-2.1 from Debian unstable

Attaching patch against Debian unstable. For ease of review, I've also pushed relevant commits and tags to the following repository:

  https://code.launchpad.net/~waveform/ubuntu/+source/lvm2/+git/lvm2

Specifically:

* logical/2.03.11-2ubuntu4 represents our split-out delta on top of old/debian (2.03.11-2)
* logical/2.03.11-2.1ubuntu1 represents our rebased delta on top of new/debian (2.03.11-2.1)
* merge/2.03.11-2.1ubuntu1 just adds the changelog and maintainer changes on top of logical/2.03.11-2.1ubuntu1

Hence, the following command may produce output useful to the purposes of review:

  git range-diff old/debian..logical/2.03.11-2ubuntu4 new/debian..logical/2.03.11-2.1ubuntu1

A test package has been built in the following PPA:

  https://launchpad.net/~waveform/+archive/ubuntu/lvm2

LGTM, sponsoring!