Origin for each line in mixer.init from check-in 47c6cc1171:

5062c9b6fc 2019-10-19        arcade: # vim:ft=make:
5062c9b6fc 2019-10-19        arcade: 
5062c9b6fc 2019-10-19        arcade: mixers=${:!find /dev -name 'mixer*'!:S/\/dev\///}
5062c9b6fc 2019-10-19        arcade: 
5062c9b6fc 2019-10-19        arcade: mixer: mount cleanvar
5062c9b6fc 2019-10-19        arcade: 	: Restoring mixer levels.
5062c9b6fc 2019-10-19        arcade: .for mixer in ${mixers}
47c6cc1171 2019-10-20        arcade: 	-test -f /var/db/${mixer}-state && mixer -f /dev/${mixer} `cat /var/db/${mixer}-state`
5062c9b6fc 2019-10-19        arcade: .endfor