undocumented feature: When a buyer didn't have enough money at the
time of the trade, the seller *automatically* granted a high-interest,
medium term loan for up to 90% of the price. This is just a silly
trap for unwary sellers and buyers alike.
(N_FIN_TROUBLE, N_CREDIT_JUNK): Unused, remove.
(rpt): Update accordingly.
a number of Subjects files to prevent name
conflicts where the only the case is difference.
Attack -> Attacking
Moving -> Transportation
Move -> Moving
Market -> Commerce
Nation -> Nations
Production -> Producing
Update -> Updating
