ngx_log_set_levels   13 src/core/ngx_log.c static char *ngx_log_set_levels(ngx_conf_t *cf, ngx_log_t *log);
ngx_log_set_levels  667 src/core/ngx_log.c     if (ngx_log_set_levels(cf, new_log) != NGX_CONF_OK) {