* section.c (bfd_section_list_remove): Don't clear s->next.

	* section.c (bfd_section_list_remove): Don't clear s->next.
	(bfd_section_list_append): Always init s->prev.
	(bfd_section_list_prepend): Define.
	(bfd_section_list_insert_after): Minor optimization.
	(bfd_section_removed_from_list): Rewrite.
	* elf.c (assign_section_numbers): Simplify list traversal now that
	bfd_section_list_remove doesn't destroy removed section next ptr.
	* sunos.c (sunos_add_dynamic_symbols): Likewise.
	* elfxx-ia64.c (elfNN_ia64_object_p): Use bfd_section_list_prepend.
	* xcofflink.c (_bfd_xcoff_bfd_final_link): Simplify list traversal.
	* bfd-in2.h: Regenerate.