RFR 8221267 : Document the jdk.net.URLClassPath.showIgnoredClassPathEntries system property

[Lance Andersen]

Looks good Brent.
> On May 1, 2019, at 2:15 PM, Brent Christian <brent.christian at oracle.com> wrote:
> 
> Hi,
> 
> The "jdk.net.URLClassPath.showIgnoredClassPathEntries" system property was added by 8211941[1].  When enabled, it provides debugging output of invalid "Class-Path" attributes in JAR manifests (which are ordinarily silently ignored).
> 
> The new property will be mentioned in the JDK 13 Release Notes, but it could also be helpful to mention in the JavaDoc (as requested during CSR review[2]).
> 
> Issues w/ Class-Path entries happen during classloading, and the ClassLoader.getSystemClassLoader() JavaDoc already has an @implNote describing other classloading-related system properties.  So that seems as good a place as any.
> 
> Please review this JavaDoc addition.  CSR[3] has been approved.
> 
> http://cr.openjdk.java.net/~bchristi/8221267/webrev01/
> 
> Thanks,
> -Brent
> 
> 1. https://bugs.openjdk.java.net/browse/JDK-8211941
> 2. https://bugs.openjdk.java.net/browse/JDK-8217215?focusedCommentId=14251670&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14251670
> 3. https://bugs.openjdk.java.net/browse/JDK-8223103
> 

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 <http://oracle.com/us/design/oracle-email-sig-198324.gif>Lance Andersen| Principal Member of Technical Staff | +1.781.442.2037
Oracle Java Engineering 
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