Origin for each line in sndiod.service.mk from check-in fa7a119fcd:

7a1e7f4a58 2019-10-21        arcade: DAEMON_sndiod_COMMAND?=/usr/local/bin/sndiod
7a1e7f4a58 2019-10-21        arcade: DAEMON_sndiod_ENABLE?=no
fa7a119fcd 2022-08-16        arcade: DAEMON_sndiod_FOREGROUND?=-d
bc20f9df9f 2019-10-24        arcade: DAEMON_sndiod_FLAGS?=-c 0:7 -j off -s default -m mon -s monitor