Includes database changes. You need to log all terms out during upgrade

More work / repairs on recent cloud backup archive code

• C9 would inappropriately archive images some active unit spec sheets under some specific circumstances removing images off website for affected spec sheets (if spec sheet content contains any unicode escapes)
• Add easy option / ability to make c9 redownload previously archived files which are reassessed to be actually live and archived in error in prior versions of c9 (as is case in last two version updates)
• Bug with c9 backup files and inclusion of cloud backup changes : resulting backup files could not be restored from without some minor repair (root cause is sql escaping encoding was configured to cope with 8.4 -> 10 psql transition with respect to escapes. The schema for cloud introduced views/ stored procedures which explicitly reference backslash in the schema definition resulting in a broken scheme. Repair is straight forward, restore standard_conforming_strings to it's default.