* modules/metadata/mod_unique_id.c: Replace use of hostname + pid with

  PRNG output.

Submitted by: Jan Kaluza <jkaluza redhat.com>
Reviewed by: sf, jorton


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1501827 13f79535-47bb-0310-9956-ffa450edef68