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

7a1e7f4a58 2019-10-21    1: DAEMON_dntpd_COMMAND?=/usr/sbin/dntpd
bc20f9df9f 2019-10-24    2: DAEMON_dntpd_FOREGROUND?=-F
7a1e7f4a58 2019-10-21    3: 
7a1e7f4a58 2019-10-21    4: dntpd: _service NETWORK