* devel-2.1: (31 commits)
  Add unittest for utils._FingerprintFile
  Release all node locks during disk replace
  Unify a few re.compile calls in DRBD
  Auto-enable early release for offline old nodes
  Skip line-length warnings in man
  Revert "Workaround man page output for long PREFIX dirs"
  Run instance hooks on more nodes
  Add {NEW,OLD}_{PRIMARY,SECONDARY} vars to hooks
  Workaround man page output for long PREFIX dirs
  Pass debug mode to noded for OS-related calls
  Convert scripts to pass options to the JobExecutor
  Add the options attribute to cli.JobExecutor
  Add debug mode to burnin
  Update scripts to pass 'opts' to SubmitOpCode
  Implement generic CLI options->opcode updates
  Change the debug CLI option to integer/count
  Add a generic 'debug_level' attribute to opcodes
  Fix bug introduced in commit 413b7472


  Fix dumpers/loaders after __slots__ cleanup
  Fix locking bug causing high CPU usage
  ...

Reviewed-by: Guido Trotter <ultrotter@google.com>