Prevent non-existent help handbook from populating the main handbook table of contents.

ksystemlog/src/ksystemlog.desktop

@@ -6,7 +6,13 @@ Name[tr]=KSistemGünlüğü
 Exec=tdesu ksystemlog %i %m -caption "%c"
 Icon=ksystemlog
 Type=Application
-DocPath=ksystemlog/ksystemlog.html
+# Restore the following key and remove this comment when a help handbook
+# is written. Disabling this key prevents populating the main handbook
+# table of contents with a non-existent document, which results in a
+# main handbook error message of
+# 'There is no documentation available for /xyz/index.html.'
+# Also disable this key when there exists only a useless template handbook.
+# DocPath=ksystemlog/ksystemlog.html
 Comment=System log viewer tool
 Comment[da]=Værktøj til at vise systemlog
 Comment[el]=Εργαλείο προβολής καταγραφής συστήματος