bin/48440: apropos(1) doesn't work on NetBSD 6.99.28

[Aleksej Saushev <asau%inbox.ru@localhost>]

>Number:         48440
>Category:       bin
>Synopsis:       apropos(1) doesn't work on NetBSD 6.99.28
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Dec 11 03:55:00 +0000 2013
>Originator:     asau%inbox.ru@localhost
>Release:        NetBSD 6.99.28
>Organization:
>Environment:
System: NetBSD lithium 6.99.28 NetBSD 6.99.28 (GENERIC) #0: Thu Nov 28 11:25:55 
MSK 2013 asau@lithium:/usr/obj/sys/arch/i386/compile/GENERIC i386
Architecture: i386
Machine: i386
>Description:
After updating to 6.99 apropos(1) stops working:

$ apropos test
apropos: _mandb entry not found in man.conf

_mandb isn't mentioned in man.conf

Attempt to rebuild database fails:
$ su root -c "makemandb -f"
makemandb: _mandb entry not found in man.conf
>How-To-Repeat:
        $ apropos test
apropos: _mandb entry not found in man.conf
>Fix:
Provide and document upgrade path.