- Fixed bugs which are not IDFEDed out:
  #340400, #340624

- Fixed bugs which are not IDFEDed out: bug #339576, bug #339570

Changes which are IFDEFed out with XSLT_REFACTORED:

* xsl:template:
  - The xsltTemplate structure was changed to have *const* @name
    and @nameURI fields:
    const xmlChar *name;
    const xmlChar *nameURI; 
  Parsing:
  - Eliminated superfluous duplication of namespace strings.  
  - template->name and template->nameURI are now put into the string dict
  - Fixed memory-leak, which occured when the local part of the "name"
    attribute was not a valid NCName.
  - Attribute 'mode': added validation of QName's local part.

* Preprocessing of stylesheets:   
  - Removal of processing-instruction and comment nodes.
  - Converting CDATA-sections-nodes to text-nodes.
  - Merging adjacent text-nodes (only in "strict" mode to
    retain old behaviour)  

* It is now an *error* if the "version" attribute is missing on
  xsl:stylesheet/xsl:transform or the first literal result element of
  a simplified stylesheet.

* It is now *not* an error if there are child-elements of 
  xsl:stylesheet/xsl:transform which are not in the XSLT namespace and
  are not recognized as registered user-defined data elements.
  Such elements must still be in a namespace and will be simply ignored.

* Minor fixes wrt to incorrect usage of attributes in the XSLT namespace
  of XSLT elements (not completed yet).

* Introduced xsltParseAnyXSLTElem(), xsltParseSequenceConstructor(), etc.
  to parse the stylesheet and apply content model validation.
  Note that the previously used backtracking grammar-checks are
  now eliminated.

* xsl:param(s) are now only allowed as immediate children of xsl:template.
  (well, except for the top-level xsl:param)

* Changed handling of exclude-result-prefixes, extension-element-prefixes.

* Changed parsing wrt to imports/inclusion: we'll first process all
  xsl:import and xsl:include instructions to build the import-tree, *then*
  process all other content of stylesheets in a deep-first order wrt
  to the import-tree. This way stuff with lower import precedence will be
  parsed before stuff with higher import precedence. TODO: check if we now
  can simplify some of the import-precedence-sorting mechanisms, which
  theoretically need not be performed anymore

* Expanded usage of xsltCompilerNodeInfo and the compiler context.
  
* Added comments

* Other things I don't remember

- Fixed bugs which are not IDFEDed out:
  bug #339583