ngx_http_access_log  184 http/modules/ngx_http_log_module.c static ngx_str_t  ngx_http_access_log = ngx_string(NGX_HTTP_LOG_PATH);
ngx_http_access_log  831 http/modules/ngx_http_log_module.c     log->file = ngx_conf_open_file(cf->cycle, &ngx_http_access_log);