RFR [14] JDK-8235183, Remove the "HACK CODE" in comment

[Xuelei Fan]

Hi,

Could I get the following update reviewed?
    http://cr.openjdk.java.net/~xuelei/8235183/webrev.00/

There are some comments in the SunJSSE implementation that come with 
"HACK CODE". Which are not really bad code. They are just used to mark 
unusual scenarios in case the block get removed in the future. However, 
"HACK" may have negative impression for some code readers. It would be 
nice to remove the "HACK CODE" and use some other words to mark the 
unusual scenarios.

Thanks,
Xuelei