Zaugurz rent is not free, nor has it been ever. However, renting basic
equipment (up to a certain value) *is* free.
I have changed the rent/offer commands for Zaugurz to be colour coded
when the rent is not free. These messages should be coloured the same
way enemy damage is, to make it very hard to miss.
My apologies for any Zaugurz players losing equipment by the rent system
being unclear, but it should hopefully be easier to keep track of now.