This update introduces command line flags for all Consul options
thus allowing users to both use a config file and CLI options to
configure Consul.
Website documentation has also been updated.
Closes#3304
* hclfmt the world
* 2 space indent
* make every example well formed with stanzas and comments
* jsonfmt too
* mdfmt manually
* _ instead of *
* no [links][], only [links][links]
* ordered lists instead of bullets when possible
* lots of wording fixes
* de-contractionization
* add 127.0.0.1 to SANs
* -1 on intentional errors
* -1 on first person
I apologize in advance for the rather long PR, but unfortunately there
is not an easy way to break this up into smaller chunks. This separates
the agent configuration into smaller, more consumable pieces just like
the job specification.
