allow to store temporary sessions within the data provider

so we can persist password reset codes, OIDC auth sessions and tokens.
These features will also work in multi-node setups without sicky
sessions now

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

webdavd/webdavd_test.go

@@ -386,7 +386,7 @@ func TestMain(m *testing.M) {
 	}()
 
 	go func() {
-		if err := httpdConf.Initialize(configDir); err != nil {
+		if err := httpdConf.Initialize(configDir, 0); err != nil {
 			logger.ErrorToConsole("could not start HTTP server: %v", err)
 			os.Exit(1)
 		}