From Gerri:

- Last part of the patch to fully activate authentication in XProofd.
- Further additions:
   - creation of a default list of workers based on the number of CPUs
    (to automatically start a local cluster with #workers == #CPUs)
   - support fo usernames longer than 8 chars (bug #22598).


git-svn-id: http://root.cern.ch/svn/root/trunk@17429 27541ba8-7e3a-0410-8455-c3a389f83636