Enhance to support new FTTB related ANCP TLVs

This issue was migrated from bug 15773 in our old bug tracker.

Original bug information:

Reporter: Jew…@‍t-s…
Status: INCOMPLETE
Product: Wireshark
Component: Dissection engine (libwireshark)
OS: All
Platform: All
Version: 3.0.1

Attachments:

ANCP-PPPoE.pcap: ANCP Port-Up, PPPoE PADI, PPPoE PADR (3 packets)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information