CPPHTTPLIB_MULTIPART_FORM_DATA_FILE_MAX_COUNT is enforced only in
Server::read_content(), where parts are accumulated into req.form. The
streaming ContentReader path keeps nothing and was never in scope, but
this was undocumented (GHSA-923p-8q8g-xcqj). Note the split in the README
and show how to bound the part count from inside a ContentReader handler.
Cookbook body links referenced sibling pages with a bare slug
(e.g. `c14-keep-alive`). Under the pretty-URL layout each page lives
in its own directory, so these resolve against the page's own
directory and 404. Prefix them with `../` to match the convention
already used in the tour and llm-app sections.
Verified clean with `docs-gen check`.
