aio-interface: improve headers (#7690)

Signed-off-by: Zoey <zoey@z0ey.de>
Signed-off-by: Simon L. <szaimen@e.mail.de>
Signed-off-by: Pablo Zmdl <pablo@nextcloud.com>
Co-authored-by: Simon L. <szaimen@e.mail.de>
Co-authored-by: Pablo Zmdl <pablo@nextcloud.com>

Containers/apache/Caddyfile

@@ -17,8 +17,11 @@
 https://{$ADDITIONAL_TRUSTED_DOMAIN}:443,
 http://{$APACHE_HOST}.nextcloud-aio:23973, # For Collabora callback and WOPI requests, see containers.json
 {$PROTOCOL}://{$NC_DOMAIN}:{$APACHE_PORT} {
-    header -Server
-    header -X-Powered-By
+    header {
+        -Server
+        -X-Powered-By
+        -Via
+    }
 
     # Collabora
     route /browser/* {