Hook IP22 kernels to the build, and document how to boot the installation

media on them. Try to be helpful and explain how things may fail on the
older PROM and what to do about this.

src/etc/etc.sgi/Makefile.inc

@@ -1,11 +1,16 @@
-#	$OpenBSD: Makefile.inc,v 1.14 2011/07/22 09:30:54 espie Exp $
+#	$OpenBSD: Makefile.inc,v 1.15 2012/03/29 20:27:53 miod Exp $
 
-KERNELS = GENERIC-IP27 bsd.IP27 GENERIC-IP30 bsd.IP30 \
-	GENERIC-IP30.MP bsd.mp.IP30 GENERIC-IP32 bsd.IP32
+KERNELS = \
+	GENERIC-IP22 bsd.IP22 \
+	GENERIC-IP27 bsd.IP27 \
+	GENERIC-IP30 bsd.IP30 \
+	GENERIC-IP30.MP bsd.mp.IP30 \
+	GENERIC-IP32 bsd.IP32
 
 bootblocks:
 	cp ${DESTDIR}/usr/mdec/boot32 ${RELEASEDIR}
 	cp ${DESTDIR}/usr/mdec/boot64 ${RELEASEDIR}
+	cp ${DESTDIR}/usr/mdec/bootecoff ${RELEASEDIR}
 
-MDEXT=	bsd.rd.IP27 bsd.rd.IP30 bsd.rd.IP32 \
-	boot32 boot64 cd${OSrev}.iso
+MDEXT=	bsd.rd.IP22 bsd.rd.IP27 bsd.rd.IP30 bsd.rd.IP32 \
+	boot32 boot64 bootecoff cd${OSrev}.iso

src/etc/etc.sgi/ttys

@@ -1,11 +1,16 @@
 #
-#	$OpenBSD: ttys,v 1.3 2008/01/09 17:39:42 miod Exp $
+#	$OpenBSD: ttys,v 1.4 2012/03/29 20:27:53 miod Exp $
 #
 # name	getty				type	status		comments
 #
 console	"/usr/libexec/getty std.9600"	vt220	on  secure
+# wsdisplay(4) glass console
 ttyC0	"/usr/libexec/getty std.9600"	vt220	off secure
+# com(4) serial ports
 tty00	"/usr/libexec/getty std.9600"	unknown	off secure
 tty01	"/usr/libexec/getty std.9600"	unknown	off secure
 tty02	"/usr/libexec/getty std.9600"	unknown	off secure
 tty03	"/usr/libexec/getty std.9600"	unknown	off secure
+# zstty(4) serial ports
+ttya	"/usr/libexec/getty std.9600"	unknown	off secure
+ttyb	"/usr/libexec/getty std.9600"	unknown	off secure