BGP: incorrect decoding COMMUNITIES whose length is larger than 255

This issue was migrated from bug 13872 in our old bug tracker.

Original bug information:

Reporter: kur…@‍iij…
Status: RESOLVED FIXED
Product: Wireshark
Component: Dissection engine (libwireshark)
OS: All
Platform: x86-64
Version: 2.2.7

Attachments:

wireshark-bgp-community-png.zip: octet at 007a (0x06) is ignored.
wireshark-bug13872.pcap: packet capture file

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