* config/tc-z8k.c: Add 2003 to copyright message.
Fold s_segm() and s_unseg() into one function s_segm(parm) which
decides by the parameter.
(md_begin): Don't set linkrelax. Only set Z8002 default if no
command line argument was given to select the intended
architecure.
(get_interrupt_operand): Warn if NOP type code is emitted.
(newfix): New parameter 'size', forward it to 'fix_new_exp'.
(apply_fix): Call newfix with additional 'size' parameter.
(build_bytes): Remove unused variable 'nib'. Detect overflow in
4 bit immediate arguments.
(md_longopts): Add 'linkrelax' option.
(md_parse_option): Adapt to new s_segm function. Set 'linkrelax'
variable when 'linkrelax' command line option is specified.
(md_show_usage): Display 'linkrelax' option.
(md_apply_fix3): Fix cases R_IMM4L, R_JR, and R_IMM8. Add cases
R_CALLR and R_REL16.
* config/tc-z8k.h: Undef WARN_SIGNED_OVERFLOW_WORD.
