Travis: Initiating build for commit '5ad27d7a9a3c77ece4990f3244ceac4d29f62cf6' on branch 'master': fixes #5358 When looking for websites for which the local time, has moved into a new day then we should use the timestamp of the last time the archiving was executed successfully.

Previous code would not work as expected, in case for example: archiving runs once a day around midnight.