HttpSysDelegator - AddOrUpdateRules fails to add rule due to bug with WeakReference/GC

[NGloreous]

Describe the bug

This unexpected condition can be hit if a GC occurs after a new DelegationQueue is initialized but before it's pulled back out of the WeakReference.

That is because even though the queue variable is still used after here the actual object isn't necessarily referenced, so the JIT/GC considers it fine to clean up the object.