- check_comment_content(): new method called from validate_comment()
- Detects URL in email field (binance.info/register?ref=... pattern)
- Blocks comments with more URLs than max_links threshold
- Blocks any link from first-time commenters (0 approved comments)
- New options: block_url_in_email, block_links_new_commenters, max_links
- Admin: new "Comment Spam Content" card in Honeypot tab with toggles
and max_links numeric input
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>