8181087: Module system implementation refresh (6/2017 update)

[Alan Bateman]

It's time to bring the changes accumulated in the jake forest into 
jdk9/dev. I'm hoping we are near the end of these updates and that we 
can close the jake forest soon.

A summary of the changes that have accumulated for this update are 
listed in this issue:
     https://bugs.openjdk.java.net/browse/JDK-8181087

Aside from the important spec/javadoc updates, this update will bring 
the -illegal-access option into JDK 9 to replace the 
--permit-illegal-access option.

The webrevs with the changes are here:
   http://cr.openjdk.java.net/~alanb/8181087/1/

-Alan