h2_session_shutdown() passed its reason, an APR or nghttp2 status, as the
error code of the GOAWAY frame. A connection timeout was sent as 70007
(APR_TIMEUP), an inadequate TLS connection as 22 (APR_EINVAL).
Give h2_session_shutdown() the HTTP/2 error code as a separate argument.
Timeouts and graceful shutdowns send NO_ERROR, failures INTERNAL_ERROR
and inadequate TLS parameters INADEQUATE_SECURITY.
PR: 70212
GitHub: closes#799
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1939156 13f79535-47bb-0310-9956-ffa450edef68