Found in team#41977

We also explicitly check for None, instead of assuming truth value,
this allows a user to pass "" as a username if they *really* want to
shoot themselves in the foot.

As per the TPA roadmap meeting of Jan 13 2025, we'll "adopt
TPA-RFC-73 as a general guide / rough plan and review as we go".

See: https://gitlab.torproject.org/tpo/tpa/team/-/wikis/meeting/2025-01-13

refs team#41721

also show an example to query by parameter value

This is the most likely scenario so it should appear first in the
documentation.

I've also modified the example command for running non-ganeti reboots so
that it directly launches the reboots and it automatically excludes
ganeti nodes.

the options were renamed to include the unit type (e.g. minutes or
seconds)

If I just copy/paste the examples from this page, I get an error like
this:

    No idea what 'perdulce.torproject.org' is!

This is because the last sed command in subshells that fetch information
is not doing what it should since output is separated by newlines
instead of spaces. With `paste` we can make this work better.

Adding an explicit token name makes it easier for people to find it again.

I feel like this is not complete, but I jotted down what I knew.