src/server/pkg/hashtree/db.go
func (o *Ordered) MkdirAll(path string) {
	var paths []string
	for path != "" {
		paths = append(paths, path)
		path, _ = split(path)
	}
	for i := len(paths) - 1; i >= 0; i-- {
		o.PutDir(paths[i])
	}
}
func (o *Ordered) MkdirAll(path string) {
	var paths []string
	for path != "" {
		paths = append(paths, path)
		path, _ = split(path)
	}
	for i := len(paths) - 1; i >= 0; i-- {
		o.PutDir(paths[i])
	}
}
// MkdirAll puts all of the parent directories of a given
// path into the hashtree.