CVS log for loncom/loncnew

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Keyword substitution: kv
Default branch: MAIN
Current tag: version_1_2_1

- Factor out link status display into UpdateStatus
- Add a call to UpdateStatus when the connection count goes to zero.
  Otherwise, since the Tick clock gets disabled, the ps status never
  shows that the process has 0 connections.
- Add/test latent support in Tick for exiting the child process with
  a lock file on the unix domain socket when the number of connections
  has been trimmed to zero.  This is currently disabled (controlled via
  the DieWhenIdle variable).   Note that since parent logic for fork on
  accept has not yet been written, some transactions may fail if this
  support is enabled at this time, because there will be a time window
  during which the child is being restarted while there is no listen on
  the unix domain socket.