* write.c (is_dnrange): Do not define if md_relax_frag is defined.

	* write.c (is_dnrange): Do not define if md_relax_frag is defined.
	(relax_segment): If md_relax_frag is defined, use it to handle a
	frag of type rs_machine_dependent rather than looking through
	md_relax_table.

	* write.c (relax_and_size_seg): Don't set SEC_HAS_CONTENTS for a
	bss section.  Set SEC_RELOC if there are any relocations, even for
	a zero size section.

	* write.c (write_relocs): In RELOC_EXPANSION_POSSIBLE case, based
	data offset on reloc[0]->address rather than reloc[j]->address, so
	that multiple relocs can affect different memory locations.

	* write.c (chain_frchains_together, relax_and_size_seg,
	adjust_reloc_syms, write_relocs): Make third argument PTR, not
	char *, to match definition of bfd_map_over_sections.