[codex] prevent panic on bare NNTP IHAVE#24
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What changed
IHAVEcommands with NNTP501before reading the message-id argumentIHAVE, verifies501, and confirms the connection still acceptsQUITWhy
handleIHaveaccessedargs[0]without validating the argument count. A client could therefore trigger an index-out-of-range panic by sendingIHAVEwithout a message-id.Fixes #23.
Validation
go test ./internal/news/nntpd -run 'TestIHaveWithoutMessageIDReturnsSyntaxError|TestProcessCollapsesRepeatedCommandWhitespace' -count=1internal/sitespass locally; that package's existing Windows-only symlink test requires a privilege unavailable in this environmentgo vet ./...