Remove global 'dispatchers', 'num_active_workers' variables

Since these are server-level variables, move them into RedsState.
However, num_active_workers was removed because:
- each dispatcher always has 1 active worker, so we can determine the
  number of active workers by counting the dispatchers
- it was never actually set correctly. Even if there was more than one
  worker, this variable was always only set to either 0 or 1.

This change required moving a bunch of helper code into RedsState as
well, an providing some RedDispatcher interfaces to access dispatcher
information from RedsState.

0 files changed, 0 insertions, 0 deletions