[exim] spamd_address option in 4.50

Just built 4.50 on Solaris 8 and used a config file from 4.44. I see the
following error:

# more exim_paniclog
2005-02-18 15:11:22 Exim configuration error in line 130 of
/opt/exim/configure:
main option "spamd_address" unknown

In /opt/exim/configure I have:

spamd_address = 127.0.0.1 8783

In the distribution I don't see spamd_address in the
src/configure.default file.

Is this option supported with the "built in" exiscan or should I use
something else? I checked the 4.50 spec.pdf and the option was listed.

Thanks,

Jim Mozley