Internet Simulator: Reduce request size limit from 5MB to 50KB

[islemaster]

Last week we implemented some monitoring and a generous 5MB limit on NetSim request sizes. After a few days of monitoring regular traffic on our new dashboard, I think we can state with confidence that the 5MB limit was at least 100 times too large.

The largest message requests we've seen in the last three days come in just under 10KB. They've hit that value a few times, so it's a good guess that this is the largest message size we normally allow through normal client use. Message requests are also our largest request type by far, over the last three days:

Request	Average	Max
Message	~230B	9.01KB
New node	~75B	169B
Node update	~160B	167B
New wire	~120B	167B
New log	~150B	1.82KB

I've decided to lower the limit from 5MB to 50KB, which should still be a fairly generous.

[Hamms]

Man, I love data-driven decisions