A crapton of corrections; parser seems a bit more cantankerous, is requiring
closing </ListItem> entries; so I added them.
Also, corrected a few misplaced or missing </para> elements.
N.B. The canonical content seems to be hosted at git://repo.or.cz/lartc.git
corrected placement of one </para> which was foiling validation
(and also aligned some text visually)
<sect3/> became <sect2/> because they could not descend directly
from <sect1>
<comment/> becomes <remark/>
The following additional changes were made in DocBook V4.0: artheader was
renamed articleinfo; comment was renamed remark; docinfo was broken into a
set of other info elements; and bookbiblio, interfacedefinition, and
seriesinfo were removed.
http://www.docbook.org/tdg/en/html/ref-elements.html
<listitem/> cannot contain text directly; wrapping in <para/>
switching a few <orderedlist/> elements to <simplelist/> with <member/>
old element <docinfo/> has been renamed <appendixinfo/>
Any <listitem/> elements without <para/> got a new friend.
Replaced two <itemizedlist/> with <simplelist/>
Removed one spuriously hovering and extraneous '>'
jade:LDP/LDP/howto/docbook/Athlon-Powersaving-HOWTO.xml:443:11:E: value of attribute "id" invalid: "7" cannot start a name
jade:LDP/LDP/howto/docbook/Athlon-Powersaving-HOWTO.xml:468:12:E: document type does not allow element "procedure" here; missing one of "caution", "important", "note", "tip", "warning", "blockquote" start-tag
jade:LDP/LDP/howto/docbook/Athlon-Powersaving-HOWTO.xml:471:5:E: character data is not allowed here
jade:LDP/LDP/howto/docbook/Athlon-Powersaving-HOWTO.xml:472:8:E: end tag for "step" which is not finished
jade:LDP/LDP/howto/docbook/Athlon-Powersaving-HOWTO.xml:474:13:E: document type does not allow element "command" here; missing one of "remark", "title", "synopsis", "cmdsynopsis", "literallayout", "programlisting", "screen", "para", "simpara", "bridgehead" start-tag
jade:LDP/LDP/howto/docbook/Athlon-Powersaving-HOWTO.xml:475:8:E: end tag for "step" which is not finished
jade:LDP/LDP/howto/docbook/Athlon-Powersaving-HOWTO.xml:477:5:E: character data is not allowed here
jade:LDP/LDP/howto/docbook/Athlon-Powersaving-HOWTO.xml:477:52:E: document type does not allow element "command" here; missing one of "remark", "title", "synopsis", "cmdsynopsis", "literallayout", "programlisting", "screen", "para", "simpara", "bridgehead" start-tag
jade:LDP/LDP/howto/docbook/Athlon-Powersaving-HOWTO.xml:478:8:E: end tag for "step" which is not finished