Unhandled exception: AttributeError: 'ConfigPlugin' object has no attribute 'getCmdlineValue'

### Step 1: Please describe your environment

* ZeroNet version: _____
* Operating system: _____
* Web browser: _____
* Tor status: not available/always/disabled
* Opened port: yes/no
* Special configuration: ____

### Step 2: Describe the problem:

#### Steps to reproduce:

1. _____
2. _____
3. _____

#### Observed Results:

* What happened? This could be a screenshot, a description, log output (you can send log/debug.log file to hello@zeronet.io if necessary), etc.

#### Expected Results:

* What did you expect to happen?

Start by reproducing the AttributeError and tracing the ConfigPlugin path that calls getCmdlineValue. The issue provides no environment, reproduction steps, expected behavior, files, or tests, so first determine the affected configuration flow and define completion as the exception no longer occurring in that flow.

Rédigé par le modèle d'indexation à partir du texte de l'issue.