No functional change; simplify the CVE-2007-6420 fix slightly, as

suggested by rpluem:

* modules/proxy/mod_proxy_balancer.c (balancer_init): Serialize the
  UUID to a string here...
  (balancer_handler): ...rather than here.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@663967 13f79535-47bb-0310-9956-ffa450edef68