[chef] Feature test vs platform test

[Gregory Patmore < >]

Hi all, 

I was wondering if there was any recommended way to feature test for upstart vs SysV init.  I've seen the examples of branching on platform, but in our hybrid environment we have versions of debian that use init, and some that use upstart, so platform branching isn't specific enough for me.

Thanks for any info/advice you can provide.