* config/m88k/xm-delta88.h: Comment out unused defines which conflict

	* config/m88k/xm-delta88.h: Comment out unused defines which conflict
	with system headers.
	* printcmd.c (printf_command): Cast second arg to vprintf to PTR.
	Use VPRINTF macro if defined.
	* config/m88k/xm-delta88.h: Define VPRINTF.  Include <sys/siginfo.h>.
	Define TIOC{GETC,GLTC}_BROKEN.
	* m88k-nat.c: Uncomment include of <sys/ptrace.h>.
	* main.c: Rename initialize_{main,cmd_lists,history} to init_* to
	make things easier on munch (apparently this matters on
	the delta88 with svr3).