Comment 4 for bug 1174498

With some help from Mike Rylander, I'm working on this "vintage" code with the intention of bringing it current and preparing it for possible inclusion.

Current status: the stored proc functions without raising errors in a 2.2 snapshot of production, focusing on transactions with payments made on or after 2012-01-01.

Next steps: output will be checked for accuracy while some of the stated issues (lack of awareness of numeric billing types) is addressed.

Working branch to follow.