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)


/**
     * After parsing, checks if the given combination of main command and can be executed.
     *
     * @return an empty List if successful, or a list of error messages
     */
    protected List<String> checkSetup() {
        List<String> messages = new ArrayList<>();
        if (command == null) {
            messages.add(coreBundle.getString("command.not.passed"));
        } else if (!isCommand(command)) {
            messages.add(String.format(coreBundle.getString("command.unknown"), command));
        } else {
            if (StringUtil.trimToNull(url) == null && StringUtil.trimToNull(referenceUrl) == null) {
                messages.add(String.format(coreBundle.getString("option.required"), "--" + OPTIONS.URL));
            }
            if (isChangeLogRequired(command) && (StringUtil.trimToNull(changeLogFile) == null)) {
                messages.add(String.format(coreBundle.getString("option.required"), "--" + OPTIONS.CHANGELOG_FILE));
            }
            if (isNoArgCommand(command) && !commandParams.isEmpty()) {
                messages.add(coreBundle.getString(ERRORMSG_UNEXPECTED_PARAMETERS) + commandParams);
            } else {
                validateCommandParameters(messages);
            }
        }
        return messages;
    }
    /**
     * Checks for unexpected (unknown) command line parameters and, if any problems are found,
     * returns the list of issues in String form.
     *