Item12839: Update AntiWikiSpamPlugin rest

 - Change them to meet new security recommendations
 - Change GET to POST for the forceUpdate button
 - Require Admin for forceUpdate

git-svn-id: http://svn.foswiki.org/trunk/AntiWikiSpamPlugin@17517 0b4bb1d4-4e5a-0410-9cc4-b2b747904278