Merge branch 'devel-2.1'

Merge branch 'devel-2.1'

* devel-2.1: (38 commits)
  Bump version to 2.1.0~rc4
  Update man page of gnt-instance
  KVM: fix pylint warning
  KVM: be more resilient on broken migration answers
  Allow filtering for (node-)tags
  Add unittests for cli.GenerateTable
  cli: Fix bug when not using headers
  daemon-util: Fix quoting issue
  Bump version to 2.1.0~rc3
  Switch the SplitKeyVal function to accept escapes
  Fix long-standing race condition bug in locking unittest
  confd client: copy the peers in UpdatePeerList
  testutils: Print name of test program before running it
  Don't use hardcoded name for pylint
  Partially revert "Makefile.am: Run pylint on all Python code"
  build-bash-completion: Take care of pylint warnings
  Add an UnescapeAndSplit function
  Makefile.am: Run pylint on all Python code
  Small improvements for release script
  check-python-code: Use “set -e” to abort on errors
  ...