- Get rid of the env to communicate the file descriptor to TProofServ.
  Also, get rid of Reads. I had to add an argument to the TProofServ
  (and TXProofServ) constructor with the 'FILE *' of the open log file.
  Using a global required to link with libProof(x) which we droped recently.
- Drop any (for the time being) unused AFS stuff from TProofServ (this
  is postponed).


git-svn-id: http://root.cern.ch/svn/root/trunk@15320 27541ba8-7e3a-0410-8455-c3a389f83636