mime.nx

mime.nx -- MIME type lookup by file extension. Used by HTTP servers (http_resp.nx) to set Content-Type from file extensions when serving static content. Small curated table of ~30 types covering 99% of web workloads. Not exhaustive; callers needing obscure types either extend the table here or pass the Content-Type explicitly. No mime- magic byte sniffing today; that's a future security-concern module (misclassifying an HTML file as text/plain can enable XSS in some contexts). Invariants: M1 Lookup is case-insensitive on the extension. M2 Unknown extensions return "application/octet-stream" (RFC 2046 default for "raw bytes of unknown type"). M3 Returned strings are const cstrings; caller must NOT free them.