Merge r1302444, r1302483:

* Correctly save the reverse proxy worker in all virtual host proxy configs.

PR: 52935
Obtained from: Petter Berntsen <petterb gmail.com>
Committed by: rpluem
Reviewed by: covener, minfrin, sf


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1307825 13f79535-47bb-0310-9956-ffa450edef68