Comment 8 for bug 1661819

This is the minimal configuration that causes the error:
```
# For Lua balancer:
load_module "modules/ngx_http_lua_module.so";

# Create it and grant sufficient rights:
user www-data;

pid /var/run/nginx.pid;

http {
}
```
Nginx fails trying to dynamically load ngx_http_lua_module, before any lua scrips.

`uname -a` returns:
```Linux nas 4.8.0-37-generic #39-Ubuntu SMP Thu Jan 26 02:27:07 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
```
The server runs Ubuntu Server 16.10.