Issue #933

Required to analyse rewrite issues in CI that are not otherwise reproducible.

Format is as per suggestion for Wireshark hex input, but I find it easier to convert to binary, e.g.

xxd -r failed_text.hex > failed.pcap

Standards checklist:

• The PR title is descriptive.
• The PR doesn't replicate another PR which is already open.
• I have read the contribution guide and followed all the instructions.
• The code follows the code style guide detailed in the wiki.
• The code is mine or it's from somewhere with an MIT-compatible license.
• The code is efficient, to the best of my ability, and does not waste computer resources.
• The code is stable and I have tested it myself, to the best of my abilities.
• The code passes sudo make test

Changes:

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