sysinst keeps getting better, I must say.  The copy I used today helped me set the timezone, and asked me if I wanted it to save the network configuration I'd provided.  I don't remember it asking that before.  I said yes.  But it didn't do it, not really.  

hostname was not in rc.conf or /etc/myname.
ditto, the domain.  
There was no /etc/ifconfig.de0 or similar entry in rc.conf.  

It did save the DNS information in /etc/resolv.conf.    

I was fine; the system is up now, but it was confusing.  

--jkl