More documentation related build failures

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

        Hello,

current builds still fail for me:

#   install  docinstall
/src/tools/bin/x86_64--netbsd-install -U -M 
/export/scratch/tron/obj/destdir.amd64/METALOG -D 
/export/scratch/tron/obj/destdir.amd64 -h sha256 -N /src/NetBSD-current/src/etc 
-c -p -r -o root -g wheel -m 444 sysman1.png  
/export/scratch/tron/obj/destdir.amd64/usr/share/doc/reference/ref3/sysman/sysman1.png
x86_64--netbsd-install: sysman1.png: stat: No such file or directory
*** [docinstall] Error code 1
nbmake[7]: stopped in /src/NetBSD-current/src/share/doc/psd/05.sysman
1 error

It seems that these files are missing from "src/share/doc/psd/05.sysman".

        Kind regards

-- 
Matthias Scheler                                 https://zhadum.org.uk/