Merge r265518-9 from trunk; explicit assignment of some global variables

to zero. These should not be neccessary, but help us get around a gcc
(on ia64 at least) optimisation bug. They are harmless anyway.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@293164 13f79535-47bb-0310-9956-ffa450edef68