[LDWG][FBSD_LDWG] paper cuts: vt(4) with Control-left and Control-right

In the side chat during yesterday's meeting:

> vt lacks support for Control key combinations for (a) previous word 
> and (b) next word.
>
> manu et al I'll follow up after the meeting.
>
Background: over the years, hundreds of paper cuts. Probably thousands 
(no exaggeration), silence about the pain was because I assumed mistake 
upon mistake with my configuration files.

At <https://en.wikipedia.org/wiki/Paper_cut_bug> there's the phrase 
"trivially fixable". Please note, I do not assume that vt will be 
trivially fixable, so I treat this as out of scope for things such as 
the Foundation's Laptop Project.

For me, the likeliest way forward will be:

1. bsdinstall, get an Internet connection, make changes before exit

2. use pkg to install X.Org and ROXTerm

3. exit

4. first boot of the installed system.

Whilst that's not the cleanliness that I'd like for my various test 
systems, it is the proper balance.

Given the package requirements (2), I'll make -dvd1.iso.xz my habit for 
(1) in cases where tests involve RELEASE.

Future paper cuts, before exiting bsdinstall, can be minimally painful, 
since I learnt that vt is the constraint :-)

<https://www.freshports.org/x11/xorg/>

<https://www.freshports.org/x11/roxterm/>