[lwip-members] Suggestion: define TMR constants in lwipopts.h instead of tcp.h

[Chris Borrelli]

Suggestion: It would be nice if TCP_TMR_INTERVAL, TCP_FAST_INTERVAL, and TCP_SLOW_INTERVAL were defined in the lwipopts.h instead of (or as well as) tcp.h

Decreasing these values really seems to increase the performance of the stack at 100Mbps.  I have these values set to 1, 2, and 5 respectively in my v2pro port and it dramatically increased transmit throughput.

Putting these into the lwipopts.h allows different arch ports to set these values without changes to the core files.

Any comments?

 -Chris

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