Fold in git archive master of mod_h2 (latest commit 11905f474e)

from https://github.com/icing/mod_h2 as per software grant.

Since this is a git archive of master (for tracking and IP
provenance history), it includes files that will likely
be removed/renamed/etc...



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1688474 13f79535-47bb-0310-9956-ffa450edef68