Add an INIT_PATH option to allow the init_path (for sys/kern/init_main.c)

to be customised in an embedded system which doesn't want to
run either init of sysinstall.

sys/conf/options

@@ -1,4 +1,4 @@
-#	$Id: options,v 1.133 1999/04/11 20:53:50 n_hibma Exp $
+#	$Id: options,v 1.134 1999/04/19 14:19:49 peter Exp $
 #
 #        On the handling of kernel options   
 # 
@@ -355,3 +355,6 @@ UMS_DEBUG		opt_usb.h
 
 # Vinum options
 VINUMDEBUG		opt_vinum.h
+
+# Embedded system options
+INIT_PATH		opt_init_path.h