Added alwaysPutToDKV argument to close().
Kept the old default behavior, though.
Use espc() everywhere instead of _espc so that overriding it works in derived classes.

Make chunkIdx() more debugger friendly by conditionally breaking out the assert on
it's own line.
It turns out that Parse2 really really wants things to be ByteVec.
So UploadFileVec now creates a ByteVec.
Delete files associated with a wrong approach to the problem.