ngx_http_test_precondition   12 http/modules/ngx_http_not_modified_filter_module.c static ngx_int_t ngx_http_test_precondition(ngx_http_request_t *r);
ngx_http_test_precondition   62 http/modules/ngx_http_not_modified_filter_module.c         return ngx_http_test_precondition(r);