RFR 8204565 : (spec) Document java.{vm.}?specification.version system properties' relation to $FEATURE

[Brent Christian]

Hi,

Please review this doc-only change.  From the bug report:

'With the integration of JEP 322 "Time-Based Release Versioning"
into JDK 10, VERSION_FEATURE is used to set the value of the system 
properties "java.specification.version" [1] and 
"java.vm.specification.version" [2] (though the term "major" is still 
used in VM code, see JDK-8193719).

We can update the System.getProperties() javadoc to be more specific 
about the value reported in these system properties.'

Issue:
https://bugs.openjdk.java.net/browse/JDK-8204565

Webrev:
http://cr.openjdk.java.net/~bchristi/8204565/webrev/

Thanks,
-Brent

1. http://hg.openjdk.java.net/jdk/jdk/rev/d2a837cf9ff1#l6.23
2. http://hg.openjdk.java.net/jdk/jdk/rev/d2a837cf9ff1#l15.17