tree MAINTENANCE cover the rest types in type free/dup function
tree MAINTENANCE cover the rest types in type free/dup function

Some of the types do not need extra care when freeing/duplicating
type structure, so note this in the default branch.

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