Changes to hexdump "struct user" for child process on some configurations

Changes to hexdump "struct user" for child process on some configurations
that use ptrace().  This is not as useful as doing a full dump in a
human readable format, but is better than nothing when you are trying
to verify what is actually in the user struct.

	* infptrace.c (udot_info): New function.
	(PT_*): Define each individually if that one is not defined.
	Update copyright to 1996.
	* rs6000-nat.c (kernel_u_size): New function
	Include <sys/user.h> for "struct user"
	Update copyright to 1996.
	* alpha-nat.c (kernel_u_size): New function.
	Include <sys/user.h> for "struct user"
	Update copyright to 1996.
	* sparc-nat.c (kernel_u_size): New function.
	Include <sys/user.h> for "struct user"
	Update copyright to 1996.
	* i386b-nat.c (kernel_u_size): New function.
	Update copyright to 1996.
	* i386v-nat.c (kernel_u_size): New function.
	Update copyright to 1996.
	* config/i386/nm-fbsd.h (KERNEL_U_SIZE): Define.
	(kernel_u_size): Declare.
	Update copyright to 1996.
	* config/i386/nm-linux.h (KERNEL_U_SIZE): Define.
	(kernel_u_size): Declare.
	Update copyright to 1996.
	* config/sparc/nm-sun4os4.h (KERNEL_U_SIZE): Define.
	(kernel_u_size): Declare.
	Update copyright to 1996.
	* config/alpha/nm-osf2.h (KERNEL_U_SIZE): Define.
	(kernel_u_size): Declare.
	Update copyright to 1996.
	* config/rs6000/nm-rs6000.h (KERNEL_U_SIZE): Define.
	(kernel_u_size): Declare.
	Update copyright to 1996.