Add proxy_read_timeout
Replaced params references with config.
Added 4 proxy parameters.
client_body_buffer_size
proxy_connect_timeout
proxy_read_timeout
proxy_send_timeout

And reference these variabels in the template.
configuration revamp

- make many more things configurable
- stop using ::params::* for things that are configurable
- add worker_rlimit_nofile option
- add tcp_nopush option
Remove duplicate line.
Cleaning up missing /etc/nginx -> $nginx::conf_dir substitutions.
Replaced params references with config.
Only add user directive if configured.
Add config option to determine if nginx is launched as root or not.
Some config white space cleanup.
Remove duplicate nofile line.
Due to recent concat module behavior nothing except strings are valid for the order parameter. This might change with this pull request https://github.com/puppetlabs/puppetlabs-concat/pull/185. Until then puppet-lint will complain.
Fixed an issue with proxy_read_timeout. This was done by properly adding 4 more config options to init and config.
client_body_buffer_size
proxy_connect_timeout
proxy_read_timeout
proxy_send_timeout