# Pastebin da2oJ6ua
root@wintermute /u/h/dch# grep delay /boot/loader.conf
root@wintermute /u/h/dch# sysrc -f /boot/loader.conf autoboot_delay=5
autoboot_delay:  -> 5
root@wintermute /u/h/dch# grep delay /boot/loader.conf
autoboot_delay="5"