rootfs-block/mount-root.sh: fixup for 8b6bf0ef5

not only fix the warning message, but the real mount arguments, too
dracut.sh: reverting return value change

reverting _get_fs_type() return values of patch
c8d685c9d3860e49f39a9c85ffebbb4c4fec341f
Mount /proc before including dracut-lib.sh.

When dracut-lib.sh is sourced it checks the command line (when not using systemd)
as part of the check_quiet() call.

Therefore mount /proc earlier in init.

Avoids the error:

init: 77: /lib/dracut-lib.sh: /proc/cmdline: No such file or directory