Remove use epoll

Nginx automatically selects most efficient method.
When you say `use epoll`, you make your configs workable only on Linux servers, no *BSD or Windows.

public/templates/nginx.conf.html

@@ -6,7 +6,6 @@ worker_rlimit_nofile 409600;
 events {
 	worker_connections 4096;
 	multi_accept on;
-	use epoll;
 }
 
 http {