ZODB/py serializes data using python pickles. Basically every serialized
object has two parts: class description and object state. Here we
start by providing minimal functionality to extract class-name from
serialized data.

The library used for pickle decoding (and in later patches encoding) is

	github.com/kisielk/og-rek

It was audited by me for security flaws to some extent.

Contrary to Python pickle module it does not run arbitrary code on
decoding.