RFR: Allow unsafe features when importing

[Robin Westberg]

On Mon, 13 Jan 2020 10:47:14 GMT, Erik Helin <ehelin at openjdk.org> wrote:

>> Hi all,
>> 
>> Please review this change that adds a new required flag for running git fast-import, required after the latest git security fixes.
>> 
>> Best regards,
>> Robin
> 
> What about older `git` versions that might not support the flag `--allow-unsafe-features`?

Don't really see any advantage in supporting versions containing multiple CVE's for the hgbridge I guess :)

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PR: https://git.openjdk.java.net/skara/pull/347