Update docs and comment for disbaling node tainting

Signed-off-by: Jeremy Scott <js185692@ncr.com>

README.md

@@ -43,6 +43,7 @@ The Piraeus High Availability Controller itself can be configured using the foll
 --request-timeout string           The length of time to wait before giving up on a single server request. Non-zero values should contain a corresponding time unit (e.g. 1s, 2m, 3h). A value of zero means don't timeout requests. (default "0")
 --resync-interval duration         how often the internal object cache should be resynchronized (default 5m0s)
 --v int32                          set log level (default 0)
+--disable-node-taints boolean      when set to true; node taints will not be applied (default false)
 ```
 
 You can directly set them through the helm chart using the matching `options` value.

pkg/agent/agent.go

@@ -568,7 +568,7 @@ func hasPersistentVolumeClaimRef(pv *corev1.PersistentVolume) bool {
 
 // TaintNode adds the specific taint to the node.
 //
-// Returns false, nil if the taint was already present.
+// Returns false, nil if the taint was already present or applying node taints had been disabled.
 func TaintNode(ctx context.Context, client kubernetes.Interface, node *corev1.Node, taint corev1.Taint, disableNodeTaints bool) (bool, error) {
 	if disableNodeTaints || node == nil {
 		return false, nil