Bugfix and regression test for copy_to_guest

The virtual CD needs to be disconnected after we copy files in,
otherwise subsequent attempts to copy files into the guest will fail or
get the previously-copied data.

First spitfire approved version of panda

some new stuff needed

Version used in rode0day-2018-06

Remove assert from seek

Remove unused assert that refs undefined variable.

works with file at least -- delivered to Andrea sept 10

Merge branch 'master' of https://github.com/moyix/panda

Don't print full CPU state on start/end replay anymore.

EXPERIMENTAL: Commit useafterfree_taint2.