[xml] Modified XHTML-serialization wrt content of the "style" and "script" elements

["Buchcik, Kasimier" <k buchcik 4commerce de>]

Hi,

When serializing XHTML, the following now applies to
the content of the elements "style" and "script":

 - no implicit CDATA section is generated
 - text nodes marked with "disable-output-escaping" are serialized
   as any other text nodes with that XSLT-specific semantic

See http://bugzilla.gnome.org/show_bug.cgi?id=345147

Regards,

Kasimier