d-i on serial console with name != ttyS/tts

[Martin Michlmayr <tbm@cyrius.com>]

I saw the following problem today: I started debian-installer on a
machine with serial console, the device node /dev/tts/0 got
created but as d-i started I repeatedly got errors saying:
    device '/dev/tts/0' does not exist.
As it turns out, this device does not use ttyS/tts as its name but
something else.  A number of devices do that.

What can we do to upport such devices?  Is this a bug/feature request
in busybox's init?
-- 
Martin Michlmayr
http://www.cyrius.com/