Was "run.sh" but renamed to "start.sh" to better complement "stop.sh".
"run.sh" is now a symbolic link to "start.sh"
Reworked Java version check to remove dependency on "bc" tool which
seems not to be installed on some Ubuntu distributions?
Removed -XX:NativeMemoryTracking flag from JVM args.
Fixed incorrect comment regarding java.net.preferIpV4Stack.
Fixed typo in comment.