Improves the user friendliness of the CacheRoot processing
over my last pass. This version avoids the pool allocations
but doesn't avoid all of the runtime checks. It no longer
terminates during post-config processing. An error is logged
once per worker, indicating that the CacheRoot needs to be set.
[Paul J. Reder]


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97466 13f79535-47bb-0310-9956-ffa450edef68