RFR: 1357: Add Oracle copyright header format check to jcheck

[Magnus Ihse Bursie]

On Fri, 6 Dec 2024 05:59:09 GMT, David Holmes <dholmes at openjdk.org> wrote:

> > The copyright year should only be updated if a "significant" change is made to the copyrighted material.
> 
> The copyright year is supposed to be always updated and we are not supposed to try to assess significance.

I've heard both statements before, but I think what David says is the latest bid. But let's not continue this discussion here; that's really an Oracle-internal discussion. 

I suggest that for this patch, we do not look at what year is used, only that it conforms to the special syntax required. We can come back and update the functionality later on if we agree that the rules permit an automatic updating.

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PR Comment: https://git.openjdk.org/skara/pull/1702#issuecomment-2522529596