> > I see no way that a plugin can suggest URLs to the main 
> program.
> > Should I just overwrite adr and fil that are passed in to
> > check-link?  That doesn't sound healthy:)
> 
> If the link is passed to check-link, you can without 
> problems patch the link (this is the hiddenn purpose of 
> check-link, actually) and assume 512 bytes room for the 
> link.
> 
> Similarly, it is "legal" to patch the destination name in 
> the save-name callback.

Thanks, that works nicely.  The 512 bytes of buffer was the
missing bit.

-Lars