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657afd5838
* fn: fnlb: enhancements and new grouper tests *) added healthy threshold (default: 1) *) grouper is now using configured hcEndpoint for version checks *) grouper now logs when servers switch between healthy/unhealthy status *) moved DB code out of grouper *) run health check immediately at start (don't wait until hcInterval) *) optional shutdown timeout (default: 0) & mgmt port (default: 8081) *) hot path List() in grouper now uses atomic ptr Load *) consistent router: moved closure to a new function *) bugfix: version parsing from fn servers should not panic fnlb *) bugfix: servers removed from DB, stayed in healthy list *) bugfix: if DB is down, health checker stopped monitoring *) basic new tests for grouper (add/rm/unhealthy/healthy) server