WIP: BER: check for invalid length octet = 0xFF
Split out of !6522 (merged)
Test with https://www.wireshark.org/download/automated/captures/fuzz-2006-07-05-1209.pcap
Split out of !6522 (merged)
Test with https://www.wireshark.org/download/automated/captures/fuzz-2006-07-05-1209.pcap