8006409: ThreadLocalRandom should dropping padding fields from its serialized form

[Martin Buchholz]

CVS has been updated with some more internal doc clarifications.

http://gee.cs.oswego.edu/cgi-bin/viewcvs.cgi/jsr166/src/main/java/util/concurrent/ThreadLocalRandom.java?view=co

Martin's "random" wishlist:
- I wish the cool convenience methods in TLR like nextInt(least, bound)
could be promoted to Random.java, or perhaps to a utility class Randoms.java
- I wish that TLR didn't continue to extend the life of Random's poor PRNG,
and at least provide one with a 2**64 period.  I don't see much value
producing a sequence compatible with Random, given that setSeed is not
available.

but it's probably too late.