[chef] Node names and case

[Jeff Blaine < >]

Currently, at least with 'knife node ...', node name matching is case
sensitive.

We know that a node name can be set as desired and does not need to be
the hostname of the node (which is always treated as case-insensitive).

Is the case sensitivity for node names intentional, or is this an
oversight that would be ideal to squash sooner than later?

Backstory:

   ME: mm778-pc.EXAMPLE.COM C:\opscode\bin\chef-client

   [ First run ]

   ME: knife node show mm778-pc.example.com
   KNIFE: Nope!
   ME: knife node show mm778-pc.EXAMPLE.COM
   KNIFE: Yup.
   ME: SIGH