It's been brought to my attention that UseCanonicalName in 1.3 is semi-broken, not completely honoring the port value when UseCanonicalName Off (see ap_get_server_port()).
Heartburn if I fix this?
dunno if you are already aware of this report: http://nagoya.apache.org/bugzilla/show_bug.cgi?id=24442
...so just as a pointer, but generally +1 to a fix.
Cheers, Erik
