[master] 3f69805f9 Release docs polish

[Dridi Boukelmoune]

>     Add param.show example in place of what looks like an unmotivated
>     param.set -j example

Please revert that part, it was meant to be a param.set -j and not an accident.

I'll try to find a better wording but basically for this:

    param.set -j bits +wanted,-part_of_defaults_but_not_wanted

It means that in the JSON output I will get the absolute value, for example:

    "none,+wanted,+part_of_defaults"

So in one atomic param.set command I can both make a partial update of
a bits parameter and collect an absolute value for future consistency
checks (if I were to implement such checks with the likes of ansible
for example).

The main use case is not having to care about the default values, and
making sure that specific bits are raised or cleared without
interfering with changes to default values when upgrading.

Dridi