Call apr_random_after_fork() manually in the child processes because the MPMs

use plain fork() and not apr_proc_fork().
Also add some workaround for APR not changing the RNG state in the parent.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1198868 13f79535-47bb-0310-9956-ffa450edef68