improve interop with other libs/stdlib

logging/funcs_multilogger.go

@@ -3,7 +3,7 @@ package logging
 import (
 	"errors"
 	"fmt"
-	`log`
+	"log"
 	"sync"
 
 	"r00t2.io/goutils/multierr"
@@ -375,7 +375,15 @@ func (m *MultiLogger) Warning(s string, v ...interface{}) (err error) {
 // ToLogger returns a stdlib log.Logger.
 func (m *MultiLogger) ToLogger(prio logPrio) (stdLibLog *log.Logger) {
 
-	stdLibLog = log.New(&logWriter{backend: m, prio: prio}, "", 0)
+	stdLibLog = log.New(m.ToRaw(prio), "", 0)
+
+	return
+}
+
+// ToRaw returns a *logWriter.
+func (m *MultiLogger) ToRaw(prio logPrio) (raw *logWriter) {
+
+	raw = &logWriter{backend: m, prio: prio}
 
 	return
 }