Running "index.php" with newtest=Y now deletes cookies... not sure if this is a great idea, but it is useful during testing if you've activated, then de-activated a survey.

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/trunk/unstable@794 b72ed6b6-b9f8-46b5-92b4-906544132732