Support extended pod logging options

Increase the supported controls on pod logging. Add validaiton to pod
log options. Ensure the Kubelet is using a consistent, structured way to
process pod log arguments.

Add ?sinceSeconds=<durationInSeconds>, &sinceTime=<RFC3339>, ?timestamps=<bool>,
?tailLines=<number>, and ?limitBytes=<number>

pkg/api/deep_copy_generated.go

@@ -1430,6 +1430,33 @@ func deepCopy_api_PodLogOptions(in PodLogOptions, out *PodLogOptions, c *convers
 	out.Container = in.Container
 	out.Follow = in.Follow
 	out.Previous = in.Previous
+	if in.SinceSeconds != nil {
+		out.SinceSeconds = new(int64)
+		*out.SinceSeconds = *in.SinceSeconds
+	} else {
+		out.SinceSeconds = nil
+	}
+	if in.SinceTime != nil {
+		out.SinceTime = new(unversioned.Time)
+		if err := deepCopy_unversioned_Time(*in.SinceTime, out.SinceTime, c); err != nil {
+			return err
+		}
+	} else {
+		out.SinceTime = nil
+	}
+	out.Timestamps = in.Timestamps
+	if in.TailLines != nil {
+		out.TailLines = new(int64)
+		*out.TailLines = *in.TailLines
+	} else {
+		out.TailLines = nil
+	}
+	if in.LimitBytes != nil {
+		out.LimitBytes = new(int64)
+		*out.LimitBytes = *in.LimitBytes
+	} else {
+		out.LimitBytes = nil
+	}
 	return nil
 }