Initial QSfera import

Server/vendor/github.com/segmentio/kafka-go/logger.go

@@ -0,0 +1,17 @@
+package kafka
+
+// Logger interface API for log.Logger.
+type Logger interface {
+	Printf(string, ...interface{})
+}
+
+// LoggerFunc is a bridge between Logger and any third party logger
+// Usage:
+//   l := NewLogger() // some logger
+//   r := kafka.NewReader(kafka.ReaderConfig{
+//     Logger:      kafka.LoggerFunc(l.Infof),
+//     ErrorLogger: kafka.LoggerFunc(l.Errorf),
+//   })
+type LoggerFunc func(string, ...interface{})
+
+func (f LoggerFunc) Printf(msg string, args ...interface{}) { f(msg, args...) }