refactored "url purification" code so same code is used at index-time and at lookup-time
refactored "url purification" code so same code is used at index-time and at lookup-time


git-svn-id: 25dac4f723c7e5b42083d4a98669c37f60455592@677 69e27eb3-6e27-0410-b9c6-fffd7e226fab

ato/wayback,ato/wayback