Merge of 1752087,1752096,1752145,1753498,1753541 from trunk:

mod_http2: removed timeouts on master connection while reuqest are being processsed
mod_http2: new H2CopyFiles directive



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1753542 13f79535-47bb-0310-9956-ffa450edef68