Support for swap on Zorro III RAM boards added

The new z3rambd(4) driver allows using Zorro III RAM boards (like ZorRAM and BigRamPlus) as swap space. If the kernel is built without this driver, it is also possible to use these boards as normal RAM memory in some configurations (which was the usual behaviour). However, it might have performance consequences, it is advised to use Zorro III RAM as swap space where possible. [0 comments]