lighttpd.conf

server.modules = (
  ...
  "mod_webdav",
  ...
)

$HTTP["host"] =~ "weave.foo.com" {
  server.document-root = "/foo/weave"
  accesslog.filename = "/var/log/lighttpd/weave/access.log"
  webdav.activate = "enable"
  webdav.is-readonly = "disable"
  webdav.sqlite-db-name = "/var/run/lighttpd/lighttpd.webdav_lock.db"
  auth.backend = "htpasswd"
  auth.backend.htpasswd.userfile = "/foo/weave/passwd.dav"
  auth.require = ( "" => ( "method" => "basic",
                           "realm" => "webdav",
                           "require" => "valid-user" ) )
}