[jdk19] RFR: 8278274: Update nroff pages in JDK 19 before RC

[David Holmes]

Please review these changes to the nroff manpage files so that they match their markdown sources that Oracle maintains.

All pages at a minimum have 19-ea replaced with 19, and copyright set to 2022 if needed.  Additionally:

The Java manpage was missing updates from:
- [JDK-8282018](https://bugs.openjdk.org/browse/JDK-8282018): Add captions to tables on java man page.

The Java manpage has slight formatting differences from:
- [JDK-8262004](https://bugs.openjdk.org/browse/JDK-8262004): Classpath separator: Man page says semicolon; should be colon on Linux
- [JDK-8236569](https://bugs.openjdk.org/browse/JDK-8236569): -Xss not multiple of 4K does not work for the main thread on macOS

The Java manpage has a typo fixed in mainline by [JDK-8279047](https://bugs.openjdk.org/browse/JDK-8279047) (for JDK 20)


The keytool manpage was missing updates from:
- [JDK-8282014](https://bugs.openjdk.org/browse/JDK-8282014): Add captions to tables on keytool man page.
- [JDK-8267319](https://bugs.openjdk.org/browse/JDK-8267319): Use larger default key sizes and algorithms based on CNSA

The jar manpage was missing updates from:
- [JDK-8278764](https://bugs.openjdk.org/browse/JDK-8278764): jar and jmod man pages need the new --date documenting from CSR [JDK-8277755](https://bugs.openjdk.org/browse/JDK-8277755)

The jarsigner manpage was missing updates from:
- [JDK-8282015](https://bugs.openjdk.org/browse/JDK-8282015): Add captions to tables on jarsigner man page.
- [JDK-8267319](https://bugs.openjdk.org/browse/JDK-8267319): Use larger default key sizes and algorithms based on CNSA

The javadoc manpage was missing updates from:
- [JDK-8279034](https://bugs.openjdk.org/browse/JDK-8279034): Update man page for javadoc `--date` option

The jmod manpage was missing updates from:
- [JDK-8278764](https://bugs.openjdk.org/browse/JDK-8278764): jar and jmod man pages need the new --date documenting from CSR [JDK-8277755](https://bugs.openjdk.org/browse/JDK-8277755)

The jpackage manpage was missing updates from:
- [JDK-8285146](https://bugs.openjdk.org/browse/JDK-8285146): Document jpackage resource dir feature
- [JDK-8284695](https://bugs.openjdk.org/browse/JDK-8284695): Update jpackage man pages for JDK 19
- [JDK-8284209](https://bugs.openjdk.org/browse/JDK-8284209): Replace remaining usages of 'a the' in source code

The jshell manpage was missing updates from:
- [JDK-8282016](https://bugs.openjdk.org/browse/JDK-8282016): Add captions to tables on jshell man page.

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Commit messages:
 - 8278274: Update nroff pages in JDK 19 before RC

Changes: https://git.openjdk.org/jdk19/pull/145/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk19&pr=145&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8278274
  Stats: 515 lines in 28 files changed: 431 ins; 16 del; 68 mod
  Patch: https://git.openjdk.org/jdk19/pull/145.diff
  Fetch: git fetch https://git.openjdk.org/jdk19 pull/145/head:pull/145

PR: https://git.openjdk.org/jdk19/pull/145