Lines of watchdogd.service from check-in 8f80b79392 that are changed by the sequence of edits moving toward check-in 47c6cc1171:

                         1: # vim:ft=make:
                         2: 
                         3: DAEMON_watchdogd_COMMAND?=/usr/sbin/watchdogd
                         4: DAEMON_watchdogd_ENABLE?=no
                         5: DAEMON_watchdogd_FLAGS?=-d
                         6: 
8f80b79392 2019-10-20    7: .if empty(${:!sysctl -qn debug.watchdog || exit 0!})
                         8: DAEMON_watchdogd_ENABLE=no
                         9: .endif
                        10: 
                        11: watchdogd: _daemon