CLI and connection handling issues

[sirocchj]

sbt --supershell=false or it will incur in sbt/sbt#5063 (thanks @barambani for finding this out)

However:

• issuing quit does not terminate connection client-side (always been the case, not a new issue)

  localhost:6379> quit
  <<< OK - [5.06ms]
  localhost:6379>
  

• Ctrl-C reports potential leak

  localhost:6379> ^C
  [warn] Canceling execution...
  [error] Total time: 124 s (02:04), completed 11-Nov-2019 08:45:47
  sbt:laserdisc> [warn] Thread[ioapp-compute-2,5,run-main-group-0] loading cats.syntax.EitherIdOps$ after test or run has completed. This is a likely resource leak
  2019-11-11 08:45:54,882 shutdown-hooks-run-all ERROR No Log4j 2 configuration file found. 
  Using default configuration (logging only errors to the console), or user programmatically provided configurations. Set system property 'log4j2.debug' to show Log4j 2 internal initialization logging. 
  See https://logging.apache.org/log4j/2.x/manual/configuration.html for instructions on how to configure Log4j 2