Merge branch 'master' of ries.debian.org:/srv/ftp.debian.org/git/dak

Merge branch 'master' of ries.debian.org:/srv/ftp.debian.org/git/dak

* 'master' of ries.debian.org:/srv/ftp.debian.org/git/dak:
  let's not reset last_used every time...
  old
  use the id, not the object
  add regex import
  clean-suites: Remove trailing whitespace
  file -> f
  we're already in the changes object
  use isinstance
  fixup
  clean-suites: Fix logic error in during source cleaning
  clean-suites: Fix SQLA usage
  Fix SQL syntax errors
  clean-suites: Use utils.warn for warnings about orphaned files
  clean-suites: Add proper logging
  daklog: Add username in every log line