http2 serverpush

[muyushifang07]

http2 status 500 时，会崩溃
switch(rc) {
case -1:
/* select error /
break;
case 0:
default:
/ timeout or readable/writable sockets */
// 此处服务端返回500 时会崩溃
curl_multi_perform(multi_handle, &still_running);

            break;
    }