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TODO  view on Meta::CPAN

    in App::Getopt->cmdline() ((2) should make multi-level option sets
    possible)
  * on request, treat options without help message as unrecognized in
    App::Getopt->cmdline()
  * set other options when setting current one (opt { set => sub { ... } })
  * print --help message as table (`rsync --help' like, at least in options
    section)
  * add priority-based option lookup
  * add environment variables handling (those options will also get their prio)
  * set/change options later, at run time, using copy-on-write strategy
    (multithreading anyone?)

List of ideas to settle
  * how about whole subtree aliases? (for subsystem to have its own view on
    config options without arduous copying all the options)