Store FLP message in memory with ZeroMQ zero-copy

[Dantali0n]

O2-Balancer/FLP/src/FLPDevice.cxx

Line 97 in 4961f6e

[](void * /*data*/, void *object) { delete[] static_cast<char *> (object); },

When deleting the message every time it is send the load on the FLP is drastically increased, The message should be stored in the FLP permanently and then transmitted using zero-copy.