Add support for old TTY ioctls to kdump.

At first I allowed ioctl_compat.h to be included, but it just returned
an empty file. I had to do this, to keep kdump happy. I really want to
raise a compiler error when including this header, so now it will just
throw an error if you don't set COMPAT_43TTY.

sys/sys/ioctl_compat.h

@@ -38,8 +38,6 @@
 #ifndef _SYS_IOCTL_COMPAT_H_
 #define	_SYS_IOCTL_COMPAT_H_
 
-#ifdef _KERNEL
-
 #ifndef COMPAT_43TTY
 #error "Definitions not available without TTY ioctl compat."
 #endif
@@ -151,6 +149,4 @@ struct sgttyb {
 #define	TIOCGLTC	_IOR('t',116,struct ltchars)/* get local special chars*/
 #define OTIOCCONS	_IO('t', 98)	/* for hp300 -- sans int arg */
 
-#endif /* _KERNEL */
-
 #endif /* !_SYS_IOCTL_COMPAT_H_ */

usr.bin/kdump/mkioctls

@@ -37,6 +37,7 @@ awk -v x="$ioctl_includes" 'BEGIN {print x}' |
 BEGIN {
 	print "/* XXX obnoxious prerequisites. */"
 	print "#define COMPAT_43"
+	print "#define COMPAT_43TTY"
 	print "#include <sys/param.h>"
 	print "#include <sys/devicestat.h>"
 	print "#include <sys/disklabel.h>"