Log Message:
audio/librespot: update to 0.4.2

Besides a couple of small fixes, this point release is mainly to blacklist the
ap-gew4 and ap-gue1 access points that caused librespot to fail to playback
anything.

Development will now shift to the new HTTP-based API, targeted for a future
v0.5.0 release. The new-api branch will therefore be promoted to dev.
This is a major departure from the old API and although it brings many exciting
new things, it is also likely to introduce new bugs and some regressions.

Long story short, this v0.4.2 release is the most stable that librespot has yet
to offer. But, unless anything big comes up, it is also intended as the last
release to be based on the old API. Happy listening.

Changed
    [playback] pipe: Better error handling
    [playback] subprocess: Better error handling

Added
    [core] apresolve: Blacklist ap-gew4 and ap-gue1 access points that cause
    channel errors
    [playback] pipe: Implement stop

Fixed
    [main] fix --opt=value line argument logging
    [playback] alsamixer: make --volume-ctrl fixed work as expected when
    combined with --mixer alsa