Change static admin password behavior #18

This password needs to be passed when deleting a link. It is passed in query parameters (GET), which is not very cool for security.

There’s no big risk of someone finding the key, but it is saved in the admin’s browsing history.

Also, a static password is not great for security again. We should derivate the key using some variables like the link name instead, but it may become uncomfortable. I guess building some kind of HTML admin view can’t be avoided.