[Jackaudio] FFADO version 2.4.3 released

The FFADO project is pleased to make FFADO version 2.4.3 available. This is a bug-fix release to address some minor problems which have been noted in version 2.4.2. * Profire-610: support line outs controlled with the master volume. Thanks to Donny Yang. * ffado-mixer: removed unnecessary import. Thanks to David Runge. * ffado-mixer: make compatible with Python 3.8. Thanks to David Runge. * ffado-mixer: locking fix. Thanks to Claudia Krelm for testing efforts which lead to a solution. FFADO version 2.4.3 is available as a tarball: http://ffado.org/files/libffado-2.4.3.tgz Regards Jonathan (on behalf of the FFADO project)