On the 2.4.x branch:

Merge r1779743,1779896,1779972 from trunk.

mod_http2: fixes PR60599, sending proper response for conditional requests
answered by mod_cache. [Jeff Wheelhouse, Stefan Eissing]



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1779975 13f79535-47bb-0310-9956-ffa450edef68