Request for review: 8017611: Auto corrector for mistyped vm options

[Tao Mao]

I'm kinda tired of mistyping VM options and figuring it out 
"mentally"...let machines do it then.

changeset:
Currently, when we mistype VM options you will get the warning as following

$java -XX:+UseParalelGC -version
Unrecognized VM option 'UseParalelGC'

I think we can do one step further to interpret the user's intent and 
suggest the correct VM options. Then i start to imagine that we have 
something like this

$java -XX:+UseParalelGC -version
Unrecognized VM option 'UseParalelGC'
Did you mean 'UseParallelGC'?

Please refer to the wikipedia 
http://en.wikipedia.org/wiki/S%C3%B8rensen%E2%80%93Dice_coefficient to 
get an idea of obtaining string similarity. This new feature is based on 
this theory.

webrev:
http://cr.openjdk.java.net/~tamao/8017611/webrev.00/

Please try out this patch and see if it meets some need.

Thanks.
Tao
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