v2.0.0 sprint 1 -- five standalone plugins requiring no core changes:
- jwt: decode JWT header/payload, flag alg=none/expired/nbf issues
- mac: IEEE OUI vendor lookup, random MAC generation, OUI download
- abuseipdb: IP reputation check + abuse reporting (admin) via API
- virustotal: hash/IP/domain/URL lookup via VT APIv3, 4/min rate limit
- emailcheck: SMTP RCPT TO verification via MX + SOCKS proxy (admin)
Also adds update_oui() to update-data.sh and documents all five
plugins in USAGE.md and CHEATSHEET.md.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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