INSTALL documentation and program wording

[Bruce Lilly <bruce.lilly+nbsd%gmail.com@localhost>]

https://mail-index.netbsd.org/netbsd-docs/2020/07/18/msg000536.html
mentions some documentation issues, but misses one glaring
discrepancy:

Where the INSTALL document at
https://ftp.netbsd.org/pub/NetBSD/NetBSD-9.0/amd64/INSTALL.html
states:

If installing via USB, you must first uncompress the USB image, which
is gzipped.
       $ gunzip NetBSD-9.0-amd64-install.img.gz

The actual file name as linked from the NetBSD home page is
https://cdn.netbsd.org/pub/NetBSD/NetBSD-9.0/images/NetBSD-9.0-amd64-uefi-install.img.gz
i.e. the INSTALL document left out the "-uefi" part of the file name
(in the bit quoted above and also a bit further down in the dd
command example).

The installer program itself (and the documentation) refer to
(installing/upgrading) a "hard disk", whereas it's possible to
install to (or upgrade) a solid-state drive (with various
interfaces), an SD card (as for an embedded OS), a USB
flash drive (I've done that[*]), as well as to a hard disk.  A
more generic term would be "drive".

* N.B. That's an install of a system TO a flash drive, not
merely installing from the installer program on a flash drive.