mod_http2, fix keepalive timeout on reset requests

Count failed requests that are RST'ed, so that the
connection enters keepalive timeout instead of the
regular timeout if the first request fails.

Add tests to verify.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1921805 13f79535-47bb-0310-9956-ffa450edef68
3 files changed