Use a  gentler flush process for resyncing.
    Potentially fix a flaw in resyncing. The problem was that a flush is set up but not triggered.
    Open metadata and audio pipes with 666 permissions for easier integration with other audio sources to give them permission to write to the audio pipe later.
    Ensure metadata and cover art are enabled if metadata support is included at compilation.
    Reword some misleading error messages.
    Set convolution defaults even if no configuration file is found.
    Quieten a few debug messages.