In /etc/rc.button I have:
BTN_0, BTN_1, failsafe, power, reset and rfkill.
In /etc/hotplug.d I have:
30-mesh-button, 40-wsplcd, 50-wps, 51-wps-reset, 52-wps-supplicant, 53-wps-repacd, 54-wps-extender.