New entry point in the transfer vector - bfd_relax_section.

	New entry point in the transfer vector - bfd_relax_section.

	* aout-target.h: add to vector, call generic_relax
	* bfd-in.h: add to vector
	* bfd.c: add #define for vector
	* bout.c: add to vector, call generic_relax
	* coffcode.h: add to vector, also now has coff specific relax code
	for the relaxable H8/300 relocs. Also clean up abs section cruft.
	* elf.c: call generic_relax
	* ieee.c: call new vector, clean up some bugs due to the creation
	of bfd_abs_section
	* libbfd.h: add bfd_generic_relax_section EXFUN
	* oasys.c: call generic_relax
	* reloc.c: implement generic_relax
	* seclet.c: moved much of this into coffcode.h
	* srec.c: call generic_relax
	* targets.c: define new transfer vector