[Piuparts-devel] pull for-holger

[Andreas Beckmann]

Andreas Beckmann (7):
      detect_piuparts_issues: detect another tar error
      post_*_squeeze-backports: some special handling needed
      p.conf: add wheezy2bpo2jessie
      lib/conf: expand depends in O(n) instead of O(n^2)
      lib/conf: clarify a variable name
      lib/conf: resolve virtual distros when querying mirror or distro
      p-s: exit gracefully if no sections were found