*: reflow comments to 80 characters

This reformats the entire Metropolis codebase to have comments no longer
than 80 characters, implementing CR/66.

This has been done half manually, as we don't have a good integration
between commentwrap/Bazel, but that can be implemented if we decide to
go for this tool/limit.

Change-Id: If1fff0b093ef806f5dc00551c11506e8290379d0
diff --git a/metropolis/node/kubernetes/service.go b/metropolis/node/kubernetes/service.go
index 5c8b037..fe701e6 100644
--- a/metropolis/node/kubernetes/service.go
+++ b/metropolis/node/kubernetes/service.go
@@ -206,7 +206,8 @@
 	return nil
 }
 
-// GetDebugKubeconfig issues a kubeconfig for an arbitrary given identity. Useful for debugging and testing.
+// GetDebugKubeconfig issues a kubeconfig for an arbitrary given identity.
+// Useful for debugging and testing.
 func (s *Service) GetDebugKubeconfig(ctx context.Context, request *apb.GetDebugKubeconfigRequest) (*apb.GetDebugKubeconfigResponse, error) {
 	client, err := s.c.KPKI.VolatileClient(ctx, request.Id, request.Groups)
 	if err != nil {