RFR: 8189102: All tools should support -?, -h and --help

[Lindenmaier, Goetz]

Hi,

The CSR for this change is approved now.
https://bugs.openjdk.java.net/browse/JDK-8191477

If there aren't any more objections, I will push this.
Webrev rebased and with updated 2018 copyright messages:
http://cr.openjdk.java.net/~goetz/wr17/8189102-helpMessage/webrev.08/

Best regards,
  Goetz.
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