RFR: 8182774: Verify code in javap [v3]

[Adam Sotona]

> This patch adds `javap -verify` option to check the class and print obvious verification errors found.
> Implementation depends on extended Class-File API verification support, so PR #16809 is important to precede.
> The new `javap` option is mentioned in man pages and a release note will be provided.
> 
> Please review.
> 
> Thank you,
> Adam

Adam Sotona has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 34 commits:

 - Merge branch 'master' into JDK-8182774-javap-verify
   
   # Conflicts:
   #	src/java.base/share/classes/jdk/internal/classfile/impl/verifier/ParserVerifier.java
   #	src/java.base/share/classes/jdk/internal/classfile/impl/verifier/VerifierImpl.java
   #	test/jdk/jdk/classfile/VerifierSelfTest.java
 - fixed typo
 - added VerificationTest
 - Merge branch 'JDK-8320396-verifier-extension' into JDK-8182774-javap-verify
 - Merge branch 'master' into JDK-8320396-verifier-extension
 - added description to javap cmd help and man page
 - 8182774: Verify code in javap
 - added references to jvms
 - Merge remote-tracking branch 'openjdk/master' into JDK-8320396-verifier-extension
 - work in progress
 - ... and 24 more: https://git.openjdk.org/jdk/compare/22ef827e...2cbcb1b4

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Changes: https://git.openjdk.org/jdk/pull/18629/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18629&range=02
  Stats: 101 lines in 6 files changed: 101 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/18629.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18629/head:pull/18629

PR: https://git.openjdk.org/jdk/pull/18629