F5ethtrailer - Add dissector for BIG-IP v15 TLS trailer

This issue was migrated from bug 15948 in our old bug tracker.

Original bug information:

Reporter: Jason Cohen
Status: RESOLVED FIXED
Product: Wireshark
Component: Dissection engine (libwireshark)
OS: All
Platform: All
Version: Git

Attachments:

tls13.pcap: Sample capture of TLS 1.3 traffic with f5ethtrailer.tls data
tls12.pcap: Sample capture of TLS 1.2 traffic with f5ethtrailer.tls data