[chef] Why need a community cookbook chef-client

[Vladimir Skubriev < >]

Why need a community cookbook chef-client?

1. This cookbook initially used by chef-client to bootstrap a new node? 
- This is assumption.
2. Using this cookbook when you want to automate chef-client runs and 
deamonize chef-client ?

    2.1 When you need to deamonize chef-client always or in specific 
situations ?

And very small question:

3. Why sometimes we need to delete validation.key via for example 
chef-client::delete_validation ?
I see this in the chef open training presentation at page 141. But don't 
understand why it was using there.

Thank you very much.

--
Best regards,

CVision Lab System Administrator
Vladmir Skubriev