Add a fingerprint for the freebox' x509_subjects

[jvoisin]

Description

Add a fingerprint for the freebox' x509_subjects

Motivation and Context

It wasn't there

How Has This Been Tested?

On my lan

Checklist:

• I have updated the documentation accordingly (or changes are not required).
• I have added tests to cover my changes (or new tests are not required).
• All new and existing tests passed.

[jvoisin]

== bin/recog_cleanup ==
C: 12: 35: [Correctable] Layout/ExtraSpacing: Unnecessary spacing detected.

14 files inspected, 1 offense detected, 1 offense autocorrectable
Error: Process completed with exit code 1.

I'll send another PR to fix this one.