bitcoin/bitcoin — pull request #5192 by domob1812 (2014-11-01 16:29:37+00:00)
Title: Move some code to undo.cpp.

Create undo.cpp as new source file and move some code related to undo opreations to it. Also simplify DisconnectBlock a bit.

I guess it is a matter of taste whether one likes these changes or not. But I think it makes sense to move the code now in `CTxInUndo::Apply` there and out of `DisconnectBlock`. It makes both functions easier to read, IMHO.