bin/52823: config(1) generates wrong cfattach data for pseudo-device ioconf

[paul%whooppee.com@localhost]

>Number:         52823
>Category:       bin
>Synopsis:       config(1) generates wrong cfattach data for pseudo-device ioconf
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Dec 16 06:35:00 +0000 2017
>Originator:     Paul Goyette
>Release:        NetBSD 8.99.7
>Organization:
+------------------+--------------------------+----------------------------+
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:          |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee dot com   |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd dot org |
+------------------+--------------------------+----------------------------+
>Environment:
	
	
System: NetBSD speedy.whooppee.com 8.99.7 NetBSD 8.99.7 (SPEEDY 2017-11-29 22:03:05 UTC) #0: Wed Nov 29 23:14:50 UTC 2017 paul%speedy.whooppee.com@localhost:/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/SPEEDY amd64
Architecture: x86_64
Machine: amd64
>Description:
For a pseudo-device which can have children attached, the inconf.h file
generated by config(1) (and the Makefile IOCONF= directive) is wrong.

It generates a single list-ending {NULL, NULL} entry, rather than providing
an initial entry with the pseudo-device as its name and attachment name.
	
>How-To-Repeat:
Create a ioconf config file pad.ioconf containing

	pseudo-device pad

Then, config -s $SRC -b $OBJ pad.ioconf

Observe at the bottom the cfattach data.
	
>Fix:
	

>Unformatted: