add NetFlow v5 support
add NetFlow v5 support

JackSlateur/AS-Stats,JackSlateur/AS-Stats,clobrother/AS-Stats,JackSlateur/AS-Stats,clobrother/AS-Stats,manuelkasper/AS-Stats,manuelkasper/AS-Stats,clobrother/AS-Stats,JackSlateur/AS-Stats,manuelkasper/AS-Stats,manuelkasper/AS-Stats,clobrother/AS-Stats