softraid crypto root with serial console?

[John Merriam]

Hello.  I am trying to create a 'headless' setup using a softraid crypto 
root with serial console on OpenBSD 5.6-release amd64.

I have everything installed and working just fine, except I'm having a 
problem getting the 'headless' part going.

I followed the instructions in section 7.6 of the FAQ at 
http://www.openbsd.org/faq/faq7.html#SerCon   I edited /etc/ttys to 
enable the getty for tty00.  I added 'set tty com0' to /etc/boot.conf

It doesn't seem to work though.  The Passphrase: prompt is still output 
to pc0, not com0.

If I enter a bogus password at the Passphrase: prompt on pc0 to get to a 
boot> prompt, I can enter 'set tty com0' after which I get a Passphrase: 
prompt on com0 and everything works fine.

It seems like for some reason /etc/boot.conf is not being seen/used?  I 
would guess it might have something to do with the softraid crypto root 
setup but I don't know.

Is there a bit that needs flipping somewhere to get the serial console 
to work with crypto root?  Any info or pointers on this would be greatly 
appreciated.  Thanks.

--

John Merriam