Origin for each line in devd.service.mk from check-in bc20f9df9f:

7a1e7f4a58 2019-10-21    1: DAEMON_devd_COMMAND?=/sbin/devd
7a1e7f4a58 2019-10-21    2: DAEMON_devd_ENABLE?=yes
bc20f9df9f 2019-10-24    3: DAEMON_devd_FOREGROUND?=-dq
7a1e7f4a58 2019-10-21    4: 
7a1e7f4a58 2019-10-21    5: devd: _earlyservice
7a1e7f4a58 2019-10-21    6: 	test -n "$${DAEMON_$@_ENABLE}" || sysctl hw.bus.devctl_disable=1