Merge remote-tracking branch 'ansgar/pu/multiarchive-2' into merge

Merge remote-tracking branch 'ansgar/pu/multiarchive-2' into merge

* ansgar/pu/multiarchive-2: (51 commits)
  dak/show_new.py: remove obsolete import
  config/debian/*: update for multiarchive changes
  dak/contents.py, daklib/contents.py: add archive option
  dak/export.py, daklib/policy.py: ignore existing files
  Revert "config/*/common: do not touch incoming"
  add export-suite subcommand to export a suite to a flat directory
  dak/clean_suites.py: allow limiting file removal to specific archives
  dak/process_upload.py: ignore non-existing files when rejecting
  dak/process_upload.py: add missing import
  daklib/archive.py: try to get all source files from pool, even when listed in changes
  daklib/archive.py: also ignore files from .changes that do not exist
  daklib/archive.py: ignore missing source files when copying to temporary directory
  dak/dakdb/update75.py: fix adding architectures for new and byhand
  dak/clean_suites.py: implement per-archive stay of execution
  dak/dakdb/update77.py: move stayofexecution to the database
  dak/control_suite.py: prefetch files table when looking up a binary or source package
  dak/generate_releases.py: add archive option
  dak/generate_packages_sources2.py: add archive option
  indicate who rejected a package
  config/*/dinstall.functions: include Built-Using sources
  ...

Signed-off-by: Joerg Jaspert <joerg@debian.org>