RFR: 8225093: Special property jdk.boot.class.path.append should not default to empty string [v3]

[Harold Seigel]

On Mon, 20 Dec 2021 18:36:45 GMT, Harold Seigel <hseigel at openjdk.org> wrote:

>> Please review this fix for JDK-8225093 to set the default value of property jdk.boot.class.path.append to NULL instead of "".  This fix was tested by running Mach5 tiers 1-2 on Linux, Mac OS, and Windows, and Mach5 tiers 3-5 on Linux x64.  The fix was also tested by running the agent.c example in JDK-8224791.
>> 
>> Thanks! Harold
>
> Harold Seigel has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add error code to test failure message

Thanks Serguei, David, and Alan for the reviews!

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PR: https://git.openjdk.java.net/jdk/pull/6868