fixing binlog syncer double-close()

Author: Shlomi Noach

go/binlog/gomysql_reader.go

@@ -160,6 +160,10 @@ func (this *GoMySQLReader) StreamEvents(canStopStreaming func() bool, entriesCha
 }
 
 func (this *GoMySQLReader) Close() error {
-	this.binlogSyncer.Close()
+	// Historically there was a:
+	//   this.binlogSyncer.Close()
+	// here. A new go-mysql version closes the binlog syncer connection independently.
+	// I will go against the sacred rules of comments and just leave this here.
+	// This is the year 2017. Let's see what year these comments get deleted.
 	return nil
 }