Using public EC2 name for manage + API exceeds nginx hash bucket size

[jamesc]

If you use a public EC2 name e.g. ec2-52-36-198-136.us-west-2.compute.amazonaws.com for the fqdn_api in chef-server.rb and the fqdn in manage.rb then nginx won't start and shows in the logs:

2016-02-17_13:29:17.97029 nginx: [emerg] could not build the server_names_hash, you should increase server_names_hash_bucket_size: 64

This already was patched in chef-analytics with an insightful comment added at https://github.com/chef/chef-analytics/blob/master/omnibus/files/cookbooks/opscode-analytics/templates/default/nginx/analytics.conf.erb#L24-L27.

We should do the needful.