Revert "xpath MAINTENANCE set_sorted_dup_node_clean is debug only"
Revert "xpath MAINTENANCE set_sorted_dup_node_clean is debug only"

This reverts commit 9c5f51ff33c2b096d4b5b6954da9b4b9dd4df456.
It is not debug-only in this branch.

lukasmacko/libyang,PavolVican/libyang,PavolVican/libyang,lukasmacko/libyang,PavolVican/libyang,PavolVican/libyang,PavolVican/libyang