kbatyr

Results 2 issues of kbatyr

Handle variable length records

Reduce allocs

Refactor goflow package to escape allocations while parsing NetFlow/IPFIX packets. Benchmark results before refactoring: ```bash goos: linux goarch: amd64 cpu: Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz BenchmarkNetFlow2-8 54494 22757 ns/op...