RFR: 8353440: Disable FTP fallback for non-local file URLs by default [v6]

[Daniel Fuchs]

On Thu, 24 Apr 2025 10:08:10 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>> Eirik Bjørsnøs has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix repeated "should should"
>
> You will still need to update `java/net/URL/OpenStream.java` to make it pass with the new changes. Possibly have two `@run`, one with `-Djdk.net.file.ftpfallback=true` and one without and adapt the test expectation based on the presence (and value) of the property.

> @dfuch I went ahead and implemented this in [5b11c07](https://github.com/openjdk/jdk/commit/5b11c073190a2bc42adf2a789407bbea9e100e7c), could you have a look?
> 
> Should be easy to revert if you are opposed to this solution for fixing the currently failing `OpenStream` test.

LGTM. I wonder if we need to add a comment in OpenStream that "bad" UNC paths are tested in NonLocalFtpFallback.

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PR Comment: https://git.openjdk.org/jdk/pull/24657#issuecomment-2829917803