Below comment is reproduced in the doc-index.sgml, which
was generated using collateindex.pl and then hand-tuned into
valid DocBook SGML (version 3.1).
The stock collateindex.pl (md5=2e36626ed6709e5ba0e6af0999bc3102, in
dsssl-stylesheets-1.79) program makes a few mistakes in generating
the complex index below.
It creates a nesting problem for <secondaryie/> elements which contain
both a <ulink/> and have a subsequent <seeie/>. In that case, it
orphans the <ulink/> elements beneath the <seeie/> AFTER closing the
<secondaryie/>. I can't figure out a patch to collateindex.pl, so
hand-fixed the 5 entries and am committing this as is for TLDP.