[crac] RFR: Close extraneous file descriptors [v3]

[Anton Kozlov]

On Fri, 24 Feb 2023 11:56:21 GMT, Radim Vansa <duke at openjdk.org> wrote:

>> Java code cannot use inherited non-standard file descriptors; these can cause trouble when trying to checkpoint the process via CRIU, and hence we will proactively close them on boot.
>
> Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Comments and change in logging

LGTM!

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Marked as reviewed by akozlov (Lead).

PR: https://git.openjdk.org/crac/pull/45