Add: NewBPF allows to create a BPF without requiring an existing handle
Add: NewBPF allows to create a BPF without requiring an existing handle

Signed-off-by: Ralph Schmieder <071b77189b4aabd52c4e38afde4f209b0660b0e2@cisco.com>

google/gopacket,google/gopacket,google/gopacket