On the 2.4.x branch: merge of r1775833 from trunk:

Cleanup mod_http2 beamer registry on server reload. Fixes PR60510.

* modules/http2/h2_bucket_beam.c
  register cleanup function on installation that NULLs the beamer
  registry on pool cleanup.

Patch by: Pavel Mateja <pavel@verotel.cz
         me



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1775834 13f79535-47bb-0310-9956-ffa450edef68