Changed db pool config to keep handles open forever rather than a billion seconds. A billion seconds from mid-May 2006 is 2038, so folks were running into the Unix Y2.038K bug a few decades early. That billion number was originally picked because 0 (keep open forever) didn't work in earlier versions of AOLserver. Early versions of the Oracle client interface on Linux used to hang when the handle was closed, thus the need to keep them open "forever". Turns out it's a good idea anyway if the db library and the appropriate db driver for AOLserver don't leak memory. Both PG and Oracle have been well-behaved in this respect, so we just keep the db handles open indefinitely by default.