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)


*
     * @param stream the output stream to write the help text to
     */
    protected void printHelp(PrintStream stream) {
        this.logLevel = Level.WARNING.toString();
        String helpText = commandLineHelpBundle.getString("commandline-helptext");
        stream.println(helpText);
    }
    /**
     * Check the string for known characters which cannot be handled
     *
     * @param arg Input parameter to check
     * @return int             A CodePointCheck object, or null to indicate all good
     */
    protected static CodePointCheck checkArg(String arg) {
        char[] chars = arg.toCharArray();
        for (int i = 0; i < chars.length; i++) {
            for (int j = 0; j < suspiciousCodePoints.length; j++) {
                if (suspiciousCodePoints[j] == chars[i]) {
                    CodePointCheck codePointCheck = new CodePointCheck();
                    codePointCheck.position = i;
                    codePointCheck.ch = chars[i];
                    return codePointCheck;
                }
            }
        }
        return null;
    }
    /**
     * Parses the command line options. If an invalid argument is given, a CommandLineParsingException is thrown.