RFR: 8271868: Warn user when using mac-sign option with unsigned app-image.

Wed Aug 4 21:05:27 UTC 2021

On Wed, 4 Aug 2021 20:00:37 GMT, Andy Herrick <herrick at openjdk.org> wrote:

> 8271868: Warn user when using mac-sign option with unsigned app-image.

What if we save "signed/not signed" flag in ".jpackage.xml" when building app image and read its value instead of guessing if they signed app image or not using `codesign`?
.jpackage.xml is designed specifically to pass data between multiple invocations of jpackage.

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PR: https://git.openjdk.java.net/jdk/pull/5004