1. Internet: Sometimes time goes behind due to clock synchronization.
2. TFRC: ESTIMATE_DELAY packets for estimating neighbor RTTs goes through
   UDP rather than TFRC (TCP).
3. The last level is fixed at 0.85 times source rate. Problem if actual
   bandwidth is a little above.


Feb 2002: Sanjay:
1. Overhead reporting - need to integrate with Yang-hua in nicer fashion.

May 2002 Sanjay:

BUG: Memory Leak:

There is a known memory leak in the Simulator.
Event::~Event() does not delete the EventMsg.
Because EventMsg is (void *) and we need exact
type for deleting. When a member leaves, we delete
all events for it in the event queue. (~SimGossipHost()).
This however does not delete the event message.
