More fixes for bcrypt-opencl. It couldn't handle things like LWS=7.
DES-opencl: Get rid of hard coded stuff and fix device auto-tuning.
Update doc/BUGS.
Merge branch 'bleeding-jumbo' into memdbg

* bleeding-jumbo:
  Update doc/BUGS.
  DES-opencl: Get rid of hard coded stuff and fix device auto-tuning.
  More fixes for bcrypt-opencl. It couldn't handle things like LWS=7.