fromEpubHref

According to the EPUB specification, the HREFs in the EPUB package must be valid URLs (so percent-encoded). Unfortunately, many EPUBs don't follow this rule, and use invalid HREFs such as my chapter.html or /dir/my chapter.html.

As a workaround, we assume the HREFs are valid percent-encoded URLs, and fallback to decoded paths if we can't parse the URL.