RFR: 8305758: Update the JAR tool man page to indicate -i/--generate-file is deprecated [v2]

[Lance Andersen]

> Hi all,
> 
> Please review this MR which updates the jar man page to to indicate that  --generate-index/-I are deprecated and may be removed in a future release
> 
> Support for JAR Index is being removed via JDK-8302819.

Lance Andersen has updated the pull request incrementally with one additional commit since the last revision:

  Update version

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/13400/files
  - new: https://git.openjdk.org/jdk/pull/13400/files/5fe1e8e1..d93ec834

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13400&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13400&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13400.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13400/head:pull/13400

PR: https://git.openjdk.org/jdk/pull/13400