Issue: New File Versions Not Applied

Fixed the data association for the next release. There was a key conflict between vw_attachmentedit.dateline and vw_revision.dateline. Upgrade script included to re-associate the missing attachment-edits.

Still need to handle the caching problem. Unless the browser cache is cleared, the new file will not appear to replace the old version for a year after the new version is uploaded.

Fixed in the next release. Added a date parameter to uncached attachment URLs, which corresponds to when it was edited. If the date parameter is present, status 304 not modified can be sent immediately.

If the date parameter is not set (as appropriate for URLs stored in the post cache, etc), the attachment request will be processed at least far enough to fetch the attachment data from the database. Status 304 not modified will then be sent if the HTTP_NOT_MODIFIED_SINCE header is newer than the last update time stored in the attachment data. Otherwise, the attachment will be sent as if it's a cache-less request.