man page reference correction

[David W. Tamkin]

Small correction to my post of Friday:

| The sendmail(8) man page has always stated something to the effect that if
| alias1 and owner-alias1 are both valid aliases, NDNs for failure to deliver
| *to* alias1 will go to owner-alias1 instead of the sender of the message.

Sorry, that is in the aliases(5) man page, of course.