Security improvements for paranoiac

[TP75]

@yshpakov FYI

Beware to fall into the trap of outdated docs and false advice

Beware to fall into the trap of outdated docs, false advice and not enabling the appropriate security measures. Please find a more current documentation available as: https://nextcloud.com/security/ NC 16 Docs » Installation and server configuration NC 16 Docs » Installation and server configuration » Hardening and security guidance Last not least the German (DE) community may consider this worth a read: Nextcloud-Scan: Security-Prüfung für Cloud-Speicher Unfortunately, the a…