* write a 'master' script to run all tests
 -> work in progress: run_all_releng
 + figure out how to store logs and search for interesting
   err/warn keywords spewed up by the script or apps it calls.
 + write common configuration facility

* releng_build_isojigdo:
 + finish boot options

* releng_check_isocontent: compare input data against the ISO image content, might be tricky
 -> work in progress

* Give up existing standard option -clean in favor of:
  + Option -keep which keeps the test data from being removed after
    the test.
  + Option -clean_up which removes the test data without doing another test.
  + Rule: A test must not overwrite existing data on disk.
          It rather shall refuse and offer option -clean_up to
          solve the problem (after skilled examination by the user).
  + Rule: A test shall remove all files which it has created.
          Only explicit user orders shall allow test files to persist.
          These orders may be program arguments or configuration variables.
  -> see releng/test_hardlinks for an implementation example

* Interpreter to read options from config files and sets the variables