Varying TAU and ETA for 160/10/0

If the first send gap is larger than 500us, then ignore the first gap when doing abest calculation

Parameters:
160/10/0/tao=50ms/eta=0.66
160/10/0/tao=50ms/eta=0.33
160/10/0/tao=50ms/eta=0.167
160/10/0/tao=25ms/eta=0.66
160/10/0/tao=25ms/eta=0.33

Packet Loss:

Parameters:			total	tcp	thttp
160/10/0/tao=50ms/eta=0.66	1	0	1	
160/10/0/tao=50ms/eta=0.33	224	97	127
160/10/0/tao=50ms/eta=0.167	531	185	346
160/10/0/tao=25ms/eta=0.66	94	31	63
160/10/0/tao=25ms/eta=0.33	1295	481	814

Throughput







Some ABests



500us is too conservative, I'll try 100us: (cdf of sendgaps below)