Revert "check for nil in offloadIPSec/IPChecksums"
Revert "check for nil in offloadIPSec/IPChecksums"

This reverts commit 331a108e87ced8cf5a7521a03f4d5eea2f9e48ff.

bmichalo/MoonGen,duk3luk3/MoonGen,emmericp/MoonGen,bmichalo/MoonGen,gallenmu/MoonGen,bmichalo/MoonGen,gallenmu/MoonGen,wenhuizhang/MoonGen,atheurer/MoonGen,scholzd/MoonGen,kidaa/MoonGen,slyon/MoonGen,scholzd/MoonGen,wenhuizhang/MoonGen,dschoeffm/MoonGen,emmericp/MoonGen,slyon/MoonGen,dschoeffm/MoonGen,kidaa/MoonGen,gallenmu/MoonGen,dschoeffm/MoonGen,gallenmu/MoonGen,emmericp/MoonGen,duk3luk3/MoonGen,wenhuizhang/MoonGen,gallenmu/MoonGen,NetronomeMoongen/MoonGen,kidaa/MoonGen,atheurer/MoonGen,NetronomeMoongen/MoonGen,scholzd/MoonGen,bmichalo/MoonGen,gallenmu/MoonGen,gallenmu/MoonGen,atheurer/MoonGen,gallenmu/MoonGen,slyon/MoonGen,slyon/MoonGen,NetronomeMoongen/MoonGen,duk3luk3/MoonGen