Use new-style s6-rc to initialize ALSA to avoid race conditions #156
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It seems that particularly on ODROID-N2 the startup of Pulseaudio and the initial ALSA initialization races: Pulseaudio is not aware of the analog audio outputs, hence breaking Audio support on the 3.5mm Jack.
According to s6-overlay documentation, /etc/cont-init.d should get initialized before the s6-rc services. However, this seems not to be the cases. Probably because the "base" dependency was missing.
In any case, just modernize the initialization by using the new-style s6-rc oneshot type for the initial ALSA initialization. Also make sure to start the udev listener before initial ALSA initialization to avoid any possible race condition.
Fixes: #157