Add comment for permission and fix wrong format variable

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

graph/pull.go

@@ -55,6 +55,7 @@ func (s *TagStore) verifyManifest(eng *engine.Engine, manifestBytes []byte) (*re
 
 		job.Args = append(job.Args, namespace)
 		job.Setenv("PublicKey", string(b))
+		// Check key has read/write permission (0x03)
 		job.SetenvInt("Permission", 0x03)
 		job.Stdout.Add(stdoutBuffer)
 		if err = job.Run(); err != nil {

registry/endpoint.go

@@ -124,6 +124,6 @@ func (e Endpoint) Ping() (RegistryInfo, error) {
 		// there is a header set, and it is not "true" or "1", so assume fails
 		info.Standalone = false
 	}
-	log.Debugf("RegistryInfo.Standalone: %q", info.Standalone)
+	log.Debugf("RegistryInfo.Standalone: %t", info.Standalone)
 	return info, nil
 }