Redirect to /api/dav when user tries to load /api/
At this moment when user tries to open /api/ page in browser response is 404 page not found.
It can be confusing thing for a regular user - will think that api(Platform) is not running ...
So when user tries to access /api/ redirect it to the /api/dav/ (WebDav).
fix in platform-220.127.116.1188 .