HTMLSec, Version 1.0, Copyright 1996 by Richard Dawe

        HTMLSec's various functions deal with sections. These are defined in
HTML files using the comment tag. The format of sections *must* be:

        <!-- *start <section name>* -->
        ...
        <!-- *end <section name>* -->

where <section name> specifies the section name. Note that there should be
exactly 1 space before the 1st asterisk, and 1 after it. HTMLSec will not be
able to discern the sections otherwise.

        When doing update operation, HTMLSec will destroy any text between the
two section markers. If no option is being performed on a section, then its
contents will be preserved. You cannot perform multiple operations on one
section - this would have to be performed in multiple passes (there is nothing
currently to be gained by performing multiple operations).