RFR (XS) 8210788 : Javadoc for Thread.join(long, int) should specify that it waits forever when both arguments are zero

[Ivan Gerasimov]

Hello!

It is a minor javadoc editing to cover the case thread.join(0, 0).
Currently, the documentation may give a wrong impression that such a 
call will not block execution of the current thread at all.

Would you please help review the fix and CSR?

BUGURL: https://bugs.openjdk.java.net/browse/JDK-8210788
CSR: https://bugs.openjdk.java.net/browse/JDK-8216379
WEBREV: http://cr.openjdk.java.net/~igerasim/8210788/00/webrev/

Thanks in advance!

-- 
With kind regards,
Ivan Gerasimov