[Exim] wishlist: hostname in exim -v -bv output

I've set up exim for UUCP deliveries. Works fine, but one thing is
confusing: exim -v -bv says 'unknown' :

# exim -v -bv miquels@???
miquels@???
deliver to miquels@???
host uucphost [unknown]

Now normally between the []'s there's the IP address of the destination
host, which in this case ofcourse _is_ unknown.

However it would be nice if the '[unknown]' was suppressed, or if it
for example showed '[transport:uucp_pipe]' or just '[uucp_pipe]'.

Mike.