multi: comprehensive typo fixes across all packages

config.go

@@ -628,7 +628,7 @@ func parseAndSetDebugLevels(debugLevel string) error {
 		// Validate subsystem.
 		if _, exists := subsystemLoggers[subsysID]; !exists {
 			str := "The specified subsystem [%v] is invalid -- " +
-				"supported subsytems %v"
+				"supported subsystems %v"
 			return fmt.Errorf(str, subsysID, supportedSubsystems())
 		}