QUrl::setPath and QUrl::fromUserInput encodes local paths differently from QUrl::fromLocalFile

https://github.com/qt/qtbase/commit/5e936b60fc921e21b8153a83113886a1de333b57 changes QUrl::fromLocalFile to percent-encode square brackets. However, a local QUrl constructed by QUrl::setPath and QUrl::fromUserInput (and possibly QUrl::setScheme?) doesn't do the encoding, resulting in regressions in user code (e.g. https://bugs.kde.org/show_bug.cgi?id=502280). It would be desirable that local QUrls representing the same path would be equal no matter how they are constructed.