TUN-528: Move cloudflared into a separate repo

vendor/zombiezen.com/go/capnproto2/rpc/internal/logutil/logutil.go

@@ -0,0 +1,36 @@
+// Package logutil provides functions that can print to a logger.
+// Any function in this package that takes in a *log.Logger can be
+// passed nil to use the log package's default logger.
+package logutil
+
+import "log"
+
+// Print calls Print on a logger or the default logger.
+// Arguments are handled in the manner of fmt.Print.
+func Print(l *log.Logger, v ...interface{}) {
+	if l == nil {
+		log.Print(v...)
+	} else {
+		l.Print(v...)
+	}
+}
+
+// Printf calls Printf on a logger or the default logger.
+// Arguments are handled in the manner of fmt.Printf.
+func Printf(l *log.Logger, format string, v ...interface{}) {
+	if l == nil {
+		log.Printf(format, v...)
+	} else {
+		l.Printf(format, v...)
+	}
+}
+
+// Println calls Println on a logger or the default logger.
+// Arguments are handled in the manner of fmt.Println.
+func Println(l *log.Logger, v ...interface{}) {
+	if l == nil {
+		log.Println(v...)
+	} else {
+		l.Println(v...)
+	}
+}