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

[Kevin Rushforth]

On Fri, 6 Dec 2024 08:45:08 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> 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.

I strongly agree with this. The reason for this PR and bug fix is to prevent the all too common error in formatting (usually a missing comma). Please let's not expand the scope to be more than that.

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PR Comment: https://git.openjdk.org/skara/pull/1702#issuecomment-2523012532