Nginx + owncloud webdav и траблы при работе с davfs2

$ sudo mount -t davfs https://cloud-storage.mydomain.com/files/webdav.php /mnt/cloud-storage.mydomain.com
Please enter the username to authenticate with server
https://cloud-storage.mydomain.com/files/webdav.php or hit enter for none.
  Username: denis
Please enter the password to authenticate user denis with server
https://cloud-storage.mydomain.com/files/webdav.php or hit enter for none.
  Password:  
/sbin/mount.davfs: warning: the server does not support locks
$ ls /mnt/cloud-storage.mydomain.com
404  lost+found

use_locks       0

sudo umount /mnt/cloud-storage.mydomain.com
sudo mount -t davfs https://cloud-storage.mydomain.com/files/webdav.php /mnt/cloud-storage.mydomain.com

$ ls -la /mnt/cloud-storage.mydomain.com
итого 1
drwxr-xr-x 3 root root 104 Апр 14 02:05 .
-rw-r--r-- 1 root root   0 Апр 14 02:05 404
drwx------ 2 root root   0 Апр 14 01:47 lost+found
$ file /mnt/cloud-storage.mydomain.com/404
/mnt/cloud-storage.mydomain.com/404: empty

server {
   listen 443 ssl;
   ssl_certificate /etc/nginx/cert/cloud-storage.mydomain.com.crt;
   ssl_certificate_key /etc/nginx/cert/cloud-storage.mydomain.com.key;
   server_name cloud-storage.mydomain.com;   
   ssl_protocols              TLSv1 TLSv1.1 TLSv1.2;
   ssl_ciphers                 AES256-SHA:AES128-SHA:RC4-SHA:DES-CBC3-SHA:RC4-MD5;
   ssl_prefer_server_ciphers   on;
   ssl_session_cache shared:SSL:10m;
   ssl_session_timeout 10m;
   access_log    /var/log/nginx/cloud-storage.mydomain.com/access.log;
   error_log       /var/log/nginx/cloud-storage.mydomain.com/error.log;
   root /var/www/cloud-storage.mydomain.com;
   index index.php;
  # dav_methods PUT DELETE MKCOL COPY MOVE;
  # dav_ext_methods PROPFIND OPTIONS;
   #create_full_put_path on;
 #  dav_access user:rw group:rw all:r;
   client_max_body_size 1000M; # set maximum upload size
   add_header Strict-Transport-Security max-age=31536000;
   add_header X-Frame-Options SAMEORIGIN;
   add_header X-Content-Security-Policy "allow 'self';";
   add_header X-XSS-Protection "1; mode=block";
   keepalive_timeout   70;
   
   location ~ ^/(data|config|\.ht|db_structure\.xml|README) {
      deny all;
   }
   
   location / {
      try_files $uri $uri/ @webdav;
   }
   location @webdav {   
      try_files $uri $uri/ 404;
      fastcgi_split_path_info ^(.+\.php)(/.*)$;
      fastcgi_pass unix:/var/run/fpm/cloud-storage.mydomain.com.sock;
      fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
      fastcgi_param HTTPS on;
      include fastcgi_params;
   }
   location ~ \.php$ {
      try_files $uri $uri/ 404;
      fastcgi_pass unix:/var/run/fpm/cloud-storage.mydomain.com.sock;
      fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
      fastcgi_param HTTPS on;
      include fastcgi_params;
   }
   location ~ /.svn/ {
      deny all;
   }
   location ~ /.git/ {
      deny all;
   }
   location ~ /.cvs/ {
      deny all;
   }
   location = /favicon.ico {
      log_not_found off;
      access_log off;
   }
   location = /robots.txt {
      log_not_found off;
      access_log off;
   }
}