RFR: JDK-8290845: Consider an alternative item separator for multi-item option values [v3]

[Jonathan Gibbons]

> Please review a medium simple update to prefer the use of comma (`,`) instead of colon (`:`) in certain options taking a list of values.    Options taking a search path (like `--class-path`, `--source-path`, etc) are **not** affected.

Jonathan Gibbons has updated the pull request incrementally with one additional commit since the last revision:

  Fix man page header

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11178/files
  - new: https://git.openjdk.org/jdk/pull/11178/files/84666156..0dc6f970

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11178&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11178&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/11178.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11178/head:pull/11178

PR: https://git.openjdk.org/jdk/pull/11178