/etc/rc: ERROR: /etc/rc: no interface specified

I have two systems on which I run -CURRENT.  I updated them yesterday to the following: FreeBSD 14.0-CURRENT #1 main-n245033-6ab923cbca87: Tue Feb 23 21:29:31 EST 2021.  Both use the stock GENERIC-NODEBUG kernel.

Since the update, the systems do not boot up correctly.  I get this late in the boot sequence:

=====
Enabling pf.
Updating /var/run/os-release done.
Creating and/or trimming log files.
Clearing /tmp (X related).
Updating motd:.
Starting syslogd.
Security policy loaded: MAC/ntpd (mac_ntpd)
Starting ntpd.
Starting powerd.
Mounting late filesystems:.
Configuring vt: blanktime.
Performing sanity check on sshd configuration.
Starting sshd.
Starting cron.
Starting background file system checks in 60 seconds.
/etc/rc: ERROR: /etc/rc: no interface specified
Usage: /etc/rc [0x00|0x01]
WARNING: attempt to domain_add(bluetooth) after domainfinalize()
/etc/rc: ERROR: Unsupported device:
=====

The last line is the final console output prior to the console login prompt.

As well as the error during boot, none of the local services (installed via pkg with startup scripts under /usr/local/etc/rc.d) start up.

Also, I can't be certain this is new, but I just noticed it: I get a bunch of extra KLDs loaded:

=====
32    4 0xffffffff82e95000     25a8 ng_bluetooth.ko
33    1 0xffffffff82e98000     a238 ng_hci.ko
34    3 0xffffffff82ea3000     aac8 netgraph.ko
35    1 0xffffffff82eae000     e250 ng_l2cap.ko
36    1 0xffffffff82ebd000    1be48 ng_btsocket.ko
=====

I don't know why it's loading bluetooth-related kernel modules as both systems are rack-mounted servers with no bluetooth hardware in them to my knowledge.

I've looked in /usr/src/UPDATING for any recent note related to this but can't find anything.  My last update (circa 5th February 2021) worked fine.

Cheers,

Paul.