move main_include and main_conf section ahead

[yorkane]

make load_module directive work in $main_include_directives and $main_conf_lines. Which in resty --main-include ./main.conf --http-include ./http.conf

load_module /usr/local/openresty/modules/ngx_lua_ipc_module.so; load_module ../modules/ngx_http_vhost_traffic_status_module.so;