[xml] Release of libxml2-2.5.6

[Daniel Veillard <veillard redhat com>]

  Okay it's a real release, not an April Fool joke :-)
       ftp://xmlsoft.org/  and GNOME FTP mirrors
       http://xmlsoft.org/
 
 This release fixes the bugs found in 2.5.5 and cleans up RelaxNG and
W3C XML Schemas Datatype support:
* Fixed W3C XML Schemas datatype, should be compliant now except
  for binHex and base64 which are not supported yet.
* bug fixes: non-ASCII IDs, HTML output, XInclude on large docs and
  XInclude entities handling, encoding detection on external subsets,
  XML Schemas bugs and memory leaks, HTML parser (James Bursa)
* portability: python/trio (Albert Chin), Sun compiler warnings
* documentation: added --relaxng option to xmllint man page (John)
* improved error reporting: xml:space, start/end tag mismatches, Relax NG errors

  This also includes a new entry point to speed up XPath queries on
large documents which is reused by libxslt-1.0.29 .

  Thanks for the reports and the patches,

Daniel

-- 
Daniel Veillard      | Red Hat Network https://rhn.redhat.com/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
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