[wsrp] [CR #301]

Document: Spec

Section: 8

Requested by: Subbu Allamaraju

Old text: Any Producer that supports cloning portlets on performBlockingInteraction()
invocations MUST support the releasePortlet() operation.

New text: Any Producer that supports cloning portlets on performBlockingInteraction()
invocations MUST support the destroyPortlets() operation.

Errata? yes

Reasoning: This apparently was left over from earlier versions of the spec.