Avoid breaking automatic upgrades to Tails 3.9

As noticed thanks to #15419 (closed), our devel branch changes the GID of the debian-tor user:

<code class="diff">
-vboxsf:x:112:
-monkeysphere:x:113:
-debian-tor:x:114:tor-launcher
-lpadmin:x:115:
+monkeysphere:x:112:
+debian-tor:x:113:tor-launcher
+lpadmin:x:114:
+vboxsf:x:115:
</code>

Feature Branch: bugfix/15695-avoid-breaking-automatic-upgrades-to-tails-3-9

Attachments

• 0001-Prevent-change-of-gid-of-debian-tor-user-breaking-au.patch
• 0002-Prevent-change-of-gid-of-debian-tor-user-breaking-au.patch
• 0001-Correct-call-to-usermod-to-pass-gid-not-uid.-refs-15.patch

Related issues

• Related to #15407 (closed)
• Related to #15424 (closed)
• Related to #13426 (closed)
• Blocks #15334 (closed)
• Blocks #15419 (closed)

Original created by @intrigeri on 15695 (Redmine)