From owner-freebsd-hackers  Sun Apr  9 10:05:07 1995
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Date: Sun, 9 Apr 1995 10:04:24 -0700
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From: PVinci@ix.netcom.com (Paul Vinciguerra)
Subject: 2.1 install "upgrade" question?
To: hackers@FreeBSD.org
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Is the 2.1 installation going to have an option to "upgrade" from 2.0R 
(the CD)?  Since the 2.0 install assumed no investment in Freebsd (it 
just layed down the image and didn't care how much time you spent 
setting up 1.x).  If you want this to be really user friendly, we need 
an option to lay down only the "delta". All serious packages offer 
"upgrade from 1.x"
"upgrade from 2.0R"
"new installation"

If this can't be done in time, I suggest an easy to find doc to walk a 
current FreeBSD'er through doing an "upgrade"