* snapshot: remove extra .heapsnapshot in msg (Sam Roberts)

 * run: support cluster_size env for backwards compat (Sam Roberts)

 * run: allow uncontrolled clustering (Sam Roberts)

 * run: stop using cluster-control.loadOptions (Sam Roberts)

 * run,runctl: control options consistent with pm (Sam Roberts)

 * run: remove debug code introduced by c4082951774 (Sam Roberts)

 * Fix bad CLA URL in CONTRIBUTING.md (Ryan Graham)

 * Add Watchdog timeout to cpu-start notification (Krishna Raman)