kurlmimedata: don't portal symlinks
they are not really supported. from testing it seems that opening O_NOFOLLOW results in the portal not being able to use the fd so ultimately we have no way to copy a symlink (instead of the file it points to)
they are not really supported. from testing it seems that opening O_NOFOLLOW results in the portal not being able to use the fd so ultimately we have no way to copy a symlink (instead of the file it points to)