According to this wiki page, the sonar.cxx.other.rules should be reloaded after SonarQube is restarted, but they are not.

To Reproduce
Steps to reproduce the behavior:

1. Go to Administration > Configuration > General Settings > CXX External Analyzers.
2. Add new rules to sonar.cxx.other.rules.
3. Click Save.
4. Restart SonarQube.

Expected behavior
New rules should be visible in Rules tab in SonarQube.

Additional context
It seems that the rules are only registered during plugin installation, see this ticket: https://community.sonarsource.com/t/how-to-retrigger-define-functions-of-rulesdefinition-in-new-version-of-sonarqube/90314.