private void parseCharRef() throws SAXException, IOException {
        parseCharRef(true /* do flushDataBuffer by default */);
    }
Parse a conditional section.

<pre>
  [61] conditionalSect ::= includeSect || ignoreSect
  [62] includeSect ::= '&lt;![' S? 'INCLUDE' S? '['
     extSubsetDecl ']]&gt;'
  [63] ignoreSect ::= '&lt;![' S? 'IGNORE' S? '['
     ignoreSectContents* ']]&gt;'
  [64] ignoreSectContents ::= Ignore
     ('&lt;![' ignoreSectContents* ']]&gt;' Ignore )*
  [65] Ignore ::= Char* - (Char* ( '&lt;![' | ']]&gt;') Char* )
</pre>

<p>
NOTE: the '&gt;![' has already been read.
src/nu/validator/gnu/xml/aelfred2/XmlParser.java