[chef] Some command line options for omnitruck install.sh not documented

[Torben Knerr < >]

Ohai Chefs,

not sure if this is the best place to raise this.

While working on a PR for a related issue in Vagrant [0], I noticed
that the `-d` and `-f` command line options of the omnitruck
`install.sh` [1] are not officially documented yet here:
https://docs.chef.io/install_omnibus.html

So what do they do?

 * if neither `-d` or `-f` are specified the omnibus package is
downloaded to a transient temp directory
 * if `-d` (directory) is specified the omnibus package will be
downloaded to that directory with its original filename being
preserved
 * if `-f` (path to filename) is specified the omnibus package will be
downloaded to that specific filename

You can find a bit more detailed description in [1].

Mind adding these to the official docs?

Cheers,
Torben


[0] https://github.com/mitchellh/vagrant/issues/4989
[1] https://github.com/opscode/opscode-omnitruck/pull/33