RFR: JDK-8178109: More useful documentation on /help

[Jan Lahoda]

The proposal here is to change the synopsis/documentation for:
/help <anything>

to show the synopsis/documentation for <anything> rather than for /help.

Bug: https://bugs.openjdk.java.net/browse/JDK-8178109
Webrev: http://cr.openjdk.java.net/~jlahoda/8178109/webrev.00/

How does it look?

Thanks,
     Jan