Add additional dav_methods.

nginx.conf.template

@@ -45,7 +45,7 @@ server {
         root   /usr/share/nginx/html;
         index  index.html index.htm;
         dav_access user:rw group:rw all:r;
-        dav_methods PUT;
+        dav_methods PUT DELETE MKCOL COPY MOVE;
         dav_ext_methods PROPFIND OPTIONS LOCK UNLOCK;
     }
 }