* srconv.c (wr_hd): Set afl field to 4 for bfd_arch_sh.

* srconv.c (wr_hd): Set afl field to 4 for bfd_arch_sh.
* sysdump.c (fillup): Return size - 1, the last byte is a checksum
and shouldn't be counted.
* sysroff.info (hd): Changed segment identifier from a byte to a 1
bit field.  The sysroff 2.0-01 specification seems to be in error
here.  Reduce width of following "spare" field from 4 to 3 bits.
(rl): Changed order and width of first 4 bitfields to correspond
to sysroff specification.
(dln_head, dln_inside, dln_tail): Removed.