Fix autodiscovery for radicale
Fix autodiscovery for radicale

See https://github.com/Kozea/Radicale/pull/95#issuecomment-50314561

tribut/vdirsyncer,mathstuf/vdirsyncer,tribut/vdirsyncer,untitaker/vdirsyncer,hobarrera/vdirsyncer,untitaker/vdirsyncer,credativUK/vdirsyncer,mathstuf/vdirsyncer,credativUK/vdirsyncer,hobarrera/vdirsyncer,untitaker/vdirsyncer