Uses the HTTPS url for cases where the existing URL has a permanent redirect. For each domain, at least one fixed derivation URL was downloaded to test the domain is properly serving downloads. Also fixes jbake source URL, which was broken.
fcitx now relies on xkeyboard_config.
Fixes #17252. (Really, this time.) Now that extra-cmake-modules does not depend on Qt 5, it is possible to depend on it directly.
