New output format: chunkedhtml. This creates a zip file containing multiple HTML files, one for each section, linked with “next,” “previous,” “up,” and “top” links. (If -o is used with an argument without an extension, it is treated as a directory and the zip file is automatically extracted there, unless it already exists.) The top page will contain a table of contents if –toc is used. A sitemap.json file is also included. The option –split-level determines the level at wh...