"scsibus* at hba?" was replaced by "scsibus* at scsi?" in 2011

First pass at removing clauses 3 and 4 from NetBSD licenses.

Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code t

First pass at removing clauses 3 and 4 from NetBSD licenses.

Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code that NetBSD has claimed for itself without attributing to the
actual authors.

OK deraadt@

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convert to new .Dd format;

kill default locators

.Xr disklabel 8, as suggested by Phil Pennock (PR 3338);

Second part of the man4 mi cleanup.
- more/better xrefs
- sync .Cd lines with actual configuration files
- intro(4) reference police
- huge usb(4) update
- follow mdoc.samples suggested man page sect

Second part of the man4 mi cleanup.
- more/better xrefs
- sync .Cd lines with actual configuration files
- intro(4) reference police
- huge usb(4) update
- follow mdoc.samples suggested man page section ordering when necessary
- add netintro(4) and hostname.if(5) xrefs to all ethernet drivers

ok deraadt@ mickey@

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o) We don't like .Pp before/after .Sh;
o) .Nm always has argument in .Sh SYNOPSIS;
o) We always closes .Bl and .Bd tags;

millert@ ok

Add man page for USB mass storage device driver.