fix thread safety of crc rate control
fix thread safety of crc rate control

gallenmu/MoonGen,duk3luk3/MoonGen,gallenmu/MoonGen,scholzd/MoonGen,gallenmu/MoonGen,gallenmu/MoonGen,NetronomeMoongen/MoonGen,gallenmu/MoonGen,scholzd/MoonGen,bmichalo/MoonGen,emmericp/MoonGen,bmichalo/MoonGen,gallenmu/MoonGen,NetronomeMoongen/MoonGen,bmichalo/MoonGen,scholzd/MoonGen,dschoeffm/MoonGen,NetronomeMoongen/MoonGen,atheurer/MoonGen,dschoeffm/MoonGen,gallenmu/MoonGen,bmichalo/MoonGen,dschoeffm/MoonGen,duk3luk3/MoonGen,duk3luk3/MoonGen,emmericp/MoonGen,gallenmu/MoonGen,atheurer/MoonGen,atheurer/MoonGen,emmericp/MoonGen