Don't require a trailing slash in the static root.
Don't require a trailing slash in the static root.

Bug reported by Tibor Vass.

eswdd/opentsdb,OpenTSDB/opentsdb,MadDogTechnology/opentsdb,johann8384/opentsdb,ShefronYudy/opentsdb,eswdd/opentsdb,andyflury/opentsdb,MadDogTechnology/opentsdb,johann8384/opentsdb,MadDogTechnology/opentsdb,OpenTSDB/opentsdb,OpenTSDB/opentsdb,andyflury/opentsdb,alienth/opentsdb,alienth/opentsdb,ShefronYudy/opentsdb