Mark RC.Spec.MinReadySeconds as k8s:optional

+k8s:optional should be used everywhere +optional is.
This does not change the vailidation of the field, but it
is a good practice, and code generator recognizes the fields
tags and outputs this comment above the field validation
as a result: "optional value-type fields with zero-value
defaults are purely documentation".

Author: jpbetz

pkg/apis/core/v1/zz_generated.validations.go

@@ -5116,6 +5116,7 @@ type ReplicationControllerSpec struct {
 	// without any of its container crashing, for it to be considered available.
 	// Defaults to 0 (pod will be considered available as soon as it is ready)
 	// +optional
+	// +k8s:optional
 	// +default=0
 	// +k8s:minimum=0
 	MinReadySeconds int32 `json:"minReadySeconds,omitempty" protobuf:"varint,4,opt,name=minReadySeconds"`