(SERVER-719) Improve default puppetserver.conf
(SERVER-719) Improve default puppetserver.conf

Improve the default puppetserver.conf file laid down on
installation by adding a comment about overriding Puppet settings
using the master-dir settings. Also, fix the listed defaults
for some of the master-dir settings to reflect the actual
defaults.

camlow325/puppet-server,waynr/puppet-server,ahpook/puppet-server,briancain/puppet-server,rlinehan/puppetserver,waynr/puppet-server,er0ck/puppetserver,fpringvaldsen/puppet-server,briancain/puppet-server,camlow325/puppetserver,stahnma/puppet-server,kylog/puppet-server,camlow325/puppet-server,er0ck/puppetserver,rlinehan/puppetserver,kylog/puppet-server,shrug/puppet-server,erikPrime/puppetserver,puppetlabs/puppetserver,cgvarela/puppet-server,er0ck/puppetserver,puppetlabs/puppetserver,cprice404/puppetserver,stahnma/puppet-server,ahpook/puppet-server,puppetlabs/puppet-server,cgvarela/puppet-server,cprice404/puppet-server,camlow325/puppetserver,cprice404/puppetserver,shrug/puppet-server,fpringvaldsen/puppet-server,erikPrime/puppet-server,rlinehan/puppet-server,erikPrime/puppet-server,camlow325/puppet-server,waynr/puppetserver,stahnma/puppet-server,briancain/puppet-server,camlow325/puppetserver,shrug/puppet-server,cprice404/puppet-server,cgvarela/puppet-server,cprice404/puppet-server,er0ck/puppetserver,shrug/puppet-server,erikPrime/puppetserver,waynr/puppetserver,puppetlabs/puppetserver,erikPrime/puppet-server,rlinehan/puppet-server,waynr/puppet-server,rlinehan/puppet-server,ahpook/puppet-server,puppetlabs/puppet-server,puppetlabs/puppet-server,camlow325/puppetserver,cprice404/puppetserver,kylog/puppet-server,erikPrime/puppetserver,puppetlabs/puppetserver,rlinehan/puppetserver,fpringvaldsen/puppet-server,rlinehan/puppetserver,waynr/puppetserver