I like this as a feature idea.  Unfortunately, there have been 
significant changes to the KDC network code since krb5 1.4 (both before 
and after this patch was submitted).  If you have the time to rewrite the 
patch against the current trunk, we'll review and possibly integrate it; 
otherwise we might implement it internally at some point but can't make 
any promises.

As discussed on krbdev, the -w option is being consumed by the worker 
processes feature, but -i (for "inetd") is not taken.