(maint) Add documentation for the PuppetDB CLI configuration options
(maint) Add documentation for the PuppetDB CLI configuration options

This commit adds documentation for the CLI's configuration options
rather than just linking to the man pages.

rbrw/puppetdb,rbrw/puppetdb,waynr/puppetdb,mullr/puppetdb,mullr/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,senior/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,mullr/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,waynr/puppetdb,mullr/puppetdb,mullr/puppetdb,senior/puppetdb,waynr/puppetdb,puppetlabs/puppetdb,senior/puppetdb,senior/puppetdb,waynr/puppetdb,puppetlabs/puppetdb