The `-altsigner` and `-altsignerpath` options in JarSigner with the underlying `ContentSigner` mechanism were deprected in Java 9, for removal in Java 16. See [JDK-8076535](https://bugs.openjdk.org/browse/JDK-8076535), [JDK-8242260](https://bugs.openjdk.org/browse/JDK-8242260).
This PR suggests it's time to remove this code: - The package `com/sun/jarsigner` is removed. This contained the `ContentSigner` and `ContentSignerParameters` along with a `package-info.java` file. - `JarSigner.java` is updated to remove processing of the `-altsigner` and `-altsignerpath` options and the loading and processing of the custom `ContentSigner`. - Similarly `c.s.s.t.jarsigner.Main` is updated to remove processing and mentioning of `-altsigner` and `-altsignerpath` options. - Mentions of the options in Resource files in the same directory is removed - The `jarsigner.1` man page is updated to remove the section on the deprecated options - The `Spec` and `Options` tests are update to remove usage of the `-altsigner` and `-altsignerpath` options. ------------- Commit messages: - Remove the com.sun.jarsigner package, the -altsigner and -altsignerpath options which have been deprecated since 9 and deprecated for removal since 16. Changes: https://git.openjdk.org/jdk/pull/12791/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12791&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8303410 Stats: 688 lines in 13 files changed: 3 ins; 661 del; 24 mod Patch: https://git.openjdk.org/jdk/pull/12791.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12791/head:pull/12791 PR: https://git.openjdk.org/jdk/pull/12791
