I have upgraded from 1.6 to 2.0. I have a few comments about the
install documentation 'Issues affecting an upgrade from NetBSD 1.6'
section.

1)
It mentions the new 'smmsp' user. I think it should also point out
that smmsp=YES is probably needed when you had sendmail=YES in 1.6?

2)
I cannot check the following because I don't have access to 1.6
anymore :-) In 1.6 I had a /etc/ifconfig.tlp0 file with:
-
inet 10.0.0.2/25
inet6 2001:888:1777::2 prefixlen 64 alias
-

In 1.6 this gave me two addresses:
2001:888:1777::200:c5ff:fe0d:e597
2001:888:1777::2

In 2.0 I do not get the 2001:888:1777::200:c5ff:fe0d:e597 address
anymore. So I changed the /etc/ifconfig.tlp0 file to:
-
inet 10.0.0.2/25
inet6 2001:888:1777::200:c5ff:fe0d:e597 prefixlen 64 alias
inet6 2001:888:1777::2 prefixlen 64 alias
-

I noticed because I have both addresses in DNS and I got connecting
timeouts on the 2001:888:1777::200:c5ff:fe0d:e597 address. <flame>
Firefox failed with an empty page because it uses its own silly
resolver code. It took me some time to find out what happened.</flame>

	rvdp