Fix for a security hole created by cloned communities/classes, the cloned communities inherit permissions from the top level dotlrn package which makes them readable by the public
Moving definition of util_memoize_flush from memoize-procs.tclto 20-memoize-init.tcl. server_cluster_httpget_from_peers procwas not defined when loading memoize procs. This issue is relatedto bug #2396.