RFR: 8151542: URL resources for multi-release jar files have a #runtime fragment appended to them

[Steve Drach]

>> I’ve updated the webrev to change all instances of the word “reified” to “real” as in getRealName().
>> 
>> Issue: https://bugs.openjdk.java.net/browse/JDK-8151542 <https://bugs.openjdk.java.net/browse/JDK-8151542>
>> 
>> Webrev: http://cr.openjdk.java.net/~sdrach/8151542/webrev.01/ <http://cr.openjdk.java.net/%7Esdrach/8151542/webrev.01/>
>>  
> The src changes looks okay but did we come to a conclusion on URLClassLoader spec? If not, can we revert the change to URLClassPath getLoader and deal with it separately?

If we revert the change to URLClassPath, then we can’t read multi-release jars referenced by the “jar:{file,http}:/some/path/mr.jar!/“ form of a URL.  These jars would be treated as non-versioned.  That would mean that a jar referenced by the URL jar:file:/some/path/mr.jar!/ and one referenced by the URL file:/some/path/mr.jar could supply different classes for the same requested entry.  Is that what we want?