FEATURE: Configuration module secret scrubbing

[gradinarufelix]

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Checklist

• Code follows the PSR-2 coding style
• Tests have been created, run and adjusted as needed
• The PR is created against the lowest maintained branch
• Reviewer - PR Title is brief but complete and starts with FEATURE|TASK|BUGFIX
• Reviewer - The first section explains the change briefly for change-logs
• Reviewer - Breaking Changes are marked with !!! and have upgrade-instructions

[mhsdesign]

Isnt the configuration module only available to administrators and thus negligible that the database connection is visible (it actually helps when debugging a neos in a cluster)

[gradinarufelix]

@mhsdesign The idea was that it should still not be visible, because the entry point is quite weak. A hijacked admin login exposes all your credentials for not only the database, but also external APIs.