Lines of watchdogd.service from check-in b8c8da525b that are changed by the sequence of edits moving toward check-in 8f80b79392:

                         1: # vim:ft=make:
                         2: 
b8c8da525b 2019-10-20    3: DAEMON_watchdogd_COMMAND?=watchdogd
                         4: DAEMON_watchdogd_ENABLE?=no
                         5: DAEMON_watchdogd_FLAGS?=-d
                         6: 
b8c8da525b 2019-10-20    7: .if empty(${:!sysctl -qn debug.watchdog!})
                         8: DAEMON_watchdogd_ENABLE=no
                         9: .endif
                        10: 
                        11: watchdogd: _daemon