add support for .tar.xz files

[jf647]

This adds support for .tar.xz and .txz files, because some authors feel the need to make my life miserable for the sake of a few bytes.

[seth]

This patch looks good. We have a contribution process that we follow for all Opscode repositories. Details below. I hope you'll be up for the few minutes inconvenience so that we can get this merged.

Thank you for taking the time to help make Chef better! We require a Contributor License Agreement (CLA) from contributors to help protect all Chef users. It is easy to complete one online. Instructions to do so are on our wiki, which is linked below. Once your account is updated, you will have access to 'resolve' tickets that indicates to the code review team that your contribution is ready for review.

http://wiki.opscode.com/display/chef/How+to+Contribute
http://wiki.opscode.com/display/chef/Code+Review

[lamont-granquist]

[jf647]

I've filed CHEF-4537 for the fix. I assume omnibus tickets go under the Chef project, as there didn't seem to be a better match.

I have filed a CLA (on Sept 6/13) and received the paperwork from EchoSign, but I haven't heard back from Opscode legal, nor do I appear to have permission to resolve the ticket, so once that comes through I'll action it.

[seth]

Awesome! Thanks for taking the time to do the paperwork. Filing in the CHEF project was the right thing. I'll ask about CLA status today.

[seth]

The specs pass for me and the change looks straight forward.

[seth]

Thanks again!