[doc] Update release notes (#3600, #3424, #3425)

docs/pages/release_notes.md

@@ -17,14 +17,65 @@ This is a {{ site.pmd.release_type }} release.
 ### Fixed Issues
 
 *   core
+    *   [#3424](https://github.com/pmd/pmd/issues/3424): \[core] Migrate CLI to using GNU-style long options
+    *   [#3425](https://github.com/pmd/pmd/issues/3425): \[core] Add a `--version` CLI option
     *   [#3635](https://github.com/pmd/pmd/issues/3635): \[ci] Update sample projects for regression tester
 *   java-performance
     *   [#3491](https://github.com/pmd/pmd/issues/3491): \[java] UselessStringValueOf: False positive when `valueOf(char [], int, int)` is used
 
 ### API Changes
 
+#### Command Line Interface
+
+The command line options for PMD and CPD now use GNU-syle long options format. E.g. instead of `-rulesets` the
+preferred usage is now `--rulesets`. Alternatively one can still use the short option `-R`.
+Some options also have been renamed to a more consistent casing pattern at the same time
+(`--fail-on-violation` instead of `-failOnViolation`).
+The old single-dash options are still supported but are deprecated and will be removed with PMD 7.
+This change allows us to improve the command line interface in the future.
+
+The changes in detail for PMD:
+
+|old option                     |new option|
+|-------------------------------|----------|
+| `-rulesets`                   | `--rulesets` (or `-R`) |
+| `-uri`                        | `--uri` |
+| `-dir`                        | `--dir` (or `-d`) |
+| `-filelist`                   | `--file-list` |
+| `-ignorelist`                 | `--ignore-list` |
+| `-format`                     | `--format` (or `-f`) |
+| `-debug`                      | `--debug` |
+| `-verbose`                    | `--verbose` |
+| `-help`                       | `--help` |
+| `-encoding`                   | `--encoding` |
+| `-threads`                    | `--threads` |
+| `-benchmark`                  | `--benchmark` |
+| `-stress`                     | `--stress` |
+| `-shortnames`                 | `--short-names` |
+| `-showsuppressed`             | `--show-suppressed` |
+| `-suppressmarker`             | `--suppress-marker` |
+| `-minimumpriority`            | `--minimum-priority` |
+| `-property`                   | `--property` |
+| `-reportfile`                 | `--report-file` |
+| `-force-language`             | `--force-language` |
+| `-auxclasspath`               | `--aux-classpath` |
+| `-failOnViolation`            | `--fail-on-violation` |
+| `--failOnViolation`           | `--fail-on-violation` |
+| `-norulesetcompatibility`     | `--no-ruleset-compatibility` |
+| `-cache`                      | `--cache` |
+| `-no-cache`                   | `--no-cache` |
+
+The changes in detail for CPD:
+
+|old option             |new option|
+|-----------------------|----------|
+| `--failOnViolation`   | `--fail-on-violation` |
+| `-failOnViolation`    | `--fail-on-violation` |
+| `--filelist`          | `--file-list` |
+
 ### External Contributions
 
+*   [#3600](https://github.com/pmd/pmd/pull/3600): \[core] Implement GNU-style long options and '--version' - [Yang](https://github.com/duanyang25)
 *   [#3612](https://github.com/pmd/pmd/pull/3612): \[java] Created fix for UselessStringValueOf false positive - [John Armgardt](https://github.com/johnra2)
 
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