8377972: Desktop.browse() no longer delegates custom URI schemes to the OS handler and instead opens the default browser

[prsadhuk]

Desktop.browse currently launches applications in browser and restricts running binaries/app URIs (executables) directly.
However it does so even if corresponding associated native app exists meaning, say, if calculator app exists in native system and Desktop.browse is called with calculator URI, then also the browser is launched and app is tried to be opened in the browser and not in corresponding native app.

To mitigate this, we have introduced a system property awt.desktop.browse_insecure to allow the user to provide URI schemes that will be allowed to be opened in corresponding app and not in default browser
User can set this property as common separated list of allowed schemes like
-Dawt.desktop.browse_insecure=calculator,file [ where calculator and file scheme will be opened in calculator and File Explorer app respectively]
or -Dawt.desktop.browse_insecure=* (all schemes allowed).
So,
If -Dawt.desktop.browse_insecure is set or scheme is in the allowed list => URI is launched in associated app.
If -Dawt.desktop.browse_insecure is NOT set or scheme is NOT in the allowed list => Browser is launched and URI is handled by the browser.

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Issue

• JDK-8377972: Desktop.browse() no longer delegates custom URI schemes to the OS handler and instead opens the default browser (Bug - P3)

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