Can automatically fragment your database into separate namespaces,
but must however be enabled from the beginning. You need to prepare
yoursite wrapper around ewiki to detect the currently accessed
Wiki; what however is useful to easily set up a WikiFarm+.
prev << "db/ext_multi"
next >> "db/oldapi"

You cannot modify the README.plugins file, but anyhow any ideas or suggestion should as usually get filed on BugReports, UserSuggestions or even better the README.plugins.Discussion.