cleanup: fix stale cask detection.

This method is also run to check formulae and if a formula and cask have
the same name (e.g. `cmake`) then this method would mark all formulae
downloads to being stale.

Instead, check the `dirname` (which we're using for globs anyway) to
double check that this is definitely a stale cask.

Note HOMEBREW_NO_INSTALL_CLEANUP in the help/manual

update-reset: avoid hanging on shallow-since.

For some reason this seems to hang when there's been no commits since
the latest tag. Not a problem in `brew update`.

fix typo

Use Mechanize to parse Content-Disposition.

cleaner: only skip non-.la symlinks

Finish option handling

ries.

Reopens Homebrew/homebrew-core#35269.
Closes Homebrew/homebrew-core#35269.

deps: accept formula options.

Also, cleanup usage of `<formula>`.

As requested in comments of #5587.

cmd/upgrade: Use CLI::Parser to parse args