Item12839: Initial start at improving rest security

This adds a %RESTHANDLERS% macro.  It reports all registered REST
handlers, verbs, and the requested security settings for the handler:
 - Is Authentication required
 - Is StrikeOne required
 - Is Is the request restricted to POST or GET?

This macro should be a <nop> for non-admins,  or at least only
display the verb and description.

git-svn-id: http://svn.foswiki.org/trunk/core@17481 0b4bb1d4-4e5a-0410-9cc4-b2b747904278