Cleanup nginx configuration file
Cleanup nginx configuration file

- Fix indentations
- Use the `ssl` parameter of the `listen` directive [1]
- Change the rewrite rule to use the recommended syntax [2]

[1]: http://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl
[2]: http://nginx.org/en/docs/http/converting_rewrite_rules.html

NewEraCracker/pfsense,ch1c4um/pfsense,phil-davis/pfsense,dennypage/pfsense,dennypage/pfsense,pfsense/pfsense,phil-davis/pfsense,NOYB/pfsense,ptorsten/pfsense,NewEraCracker/pfsense,brunostein/pfsense,BlackstarGroup/pfsense,dennypage/pfsense,phil-davis/pfsense,jxmx/pfsense,ch1c4um/pfsense,ch1c4um/pfsense,phil-davis/pfsense,jxmx/pfsense,NOYB/pfsense,jxmx/pfsense,ptorsten/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,NewEraCracker/pfsense,pfsense/pfsense,NewEraCracker/pfsense,BlackstarGroup/pfsense,dennypage/pfsense,NOYB/pfsense,brunostein/pfsense,BlackstarGroup/pfsense,pfsense/pfsense,pfsense/pfsense,ptorsten/pfsense,brunostein/pfsense