We have a liquibase command that looks something like this:

```sh
/liquibase/liquibase \
       --driver=org.postgresql.Driver \
       --changeLogFile="db.changelog-master.xml" \
       --url=<redacted> \
       --username=<redacted> \
       --password=<redacted> \
       update \
       -Dcoreschema="${core_schema}"
```

After upgrading the CLI from 4.3.3 to 4.4.0, it fails with the following error:

```
Unexpected argument(s): -Dcoreschema=public

For detailed help, try 'liquibase --help' or 'liquibase <command-name> --help'
```

Since the release notes state "this release should be 100% backwards compatible", I expect this is an oversight? Or is there a replacement for the `-Dproperty=value` syntax? I haven't found one looking through `--help` and the [property substitution docs](https://docs.liquibase.com/concepts/basic/changelog-property-substitution.html) at least.

The syntax can also still be found on https://docs.liquibase.com/tools-integrations/cli/home.html:

![image](https://user-images.githubusercontent.com/2620907/122090597-36d63400-ce08-11eb-92e8-d320cd5c5baa.png)


}
            if (COMMANDS.DIFF.equalsIgnoreCase(command)) {
                if (commandParams.contains("--help")) {
                    outputStream.println("liquibase diff" +
                            "\n" +
                            "          Outputs a description of differences.  If you have a Liquibase Pro key, you can output the differences as JSON using the --format=JSON option\n");
                    System.exit(0);
                }
                if (isFormattedDiff()) {
                    CommandScope liquibaseCommand = new CommandScope("internalFormattedDiff");
                    CommandScope diffCommand = CommandLineUtils.createDiffCommand(
                            createReferenceDatabaseFromCommandParams(commandParams, fileOpener),
                            database,
                            StringUtil.trimToNull(diffTypes), finalSchemaComparisons, objectChangeFilter, new PrintStream(getOutputStream()));
                    liquibaseCommand.addArgumentValue("format", getCommandParam(OPTIONS.FORMAT, "JSON").toUpperCase());
                    liquibaseCommand.addArgumentValue("diffCommand", diffCommand);
                    liquibaseCommand.setOutput(getOutputStream());
                    liquibaseCommand.execute();
                } else {
                    CommandLineUtils.doDiff(
                            createReferenceDatabaseFromCommandParams(commandParams, fileOpener),
                            database,
                            StringUtil.trimToNull(diffTypes), finalSchemaComparisons, objectChangeFilter, new PrintStream(getOutputStream()));
                }
                return;
            } else if (COMMANDS.DIFF_CHANGELOG.equalsIgnoreCase(command)) {
                CommandLineUtils.doDiffToChangeLog(changeLogFile,
                        createReferenceDatabaseFromCommandParams(commandParams, fileOpener),
                        database,
                        diffOutputControl, objectChangeFilter, StringUtil.trimToNull(diffTypes), finalSchemaComparisons