Yuvomi

Changed

• Documented the two existing SSRF opt-in environment variables that let internally-resolving (LAN / private IP / internal-DNS) URLs be used, which were previously only mentioned in .env.example and the Unraid template (#520). ICS_SUBSCRIPTION_ALLOW_PRIVATE_NETWORK (for ICS calendar subscriptions) and DOCUMENT_STORAGE_WEBDAV_ALLOW_PRIVATE_NETWORK (for WebDAV document storage) are now covered in the README (EN and DE) and the installation guide’s environment-variable tables, including why the check exists and why it stays an environment-level rather than a web-UI setting. Documentation only; no behaviour, data model or configuration changes.