is it possible for an admin to kill locks?
Is there an administrative UI for killing locks?
Within a not-authenticating server everyone can remove a lock via UNLOCK. If the server is authenticating, only the lock owner is allowed to unlock the resource.
We are planning to have a super-user concept in the next version of Tamino WebDAV Server. This super-user will be able to unlock any resource.
On the GUI side you could use the Tamino Basic Client (http://developer.softwareag.com/tamino/webdav/download.htm), which is protocol oriented; or the DavExplorer, which has a Explorer like style (http://www1.ics.uci.edu/~webdav/).