added session activity logging which helps with diagnosing abberant activity, added ec_max_of_list which is used in checkout-one-form* code (to be added shortly)
Oops, a tiny blunder in my previous update, returned an illegal SQLsnippet if there were no IDs selected. The list builder should cleverlyrefuse to do the query in this case, but we'll settle for it doing a SELECTthat returns nothing for now.