moved string and UTF8 routines out of parser.c and encoding.c into a new

* encoding.c, parser.c, xmlstring.c, Makefile.am,
  include/libxml/Makefile.am, include/libxml/catalog.c,
  include/libxml/chvalid.h, include/libxml/encoding.h,
  include/libxml/parser.h, include/libxml/relaxng.h,
  include/libxml/tree.h, include/libxml/xmlwriter.h,
  include/libxml/xmlstring.h:
  moved string and UTF8 routines out of parser.c and encoding.c
  into a new module xmlstring.c with include file
  include/libxml/xmlstring.h mostly using patches from Reid
  Spencer.  Since xmlChar now defined in xmlstring.h, several
  include files needed to have a #include added for safety.
* doc/apibuild.py: added some additional sorting for various
  references displayed in the APIxxx.html files.  Rebuilt the
  docs, and also added new file for xmlstring module.
* configure.in: small addition to help my testing; no effect on
  normal usage.
* doc/search.php: added $_GET[query] so that persistent globals
  can be disabled (for recent versions of PHP)
diff --git a/doc/APIchunk25.html b/doc/APIchunk25.html
index b37f756..b0a9ba8 100644
--- a/doc/APIchunk25.html
+++ b/doc/APIchunk25.html
@@ -358,12 +358,12 @@
 <a href="html/libxml-parser.html#resolveEntitySAXFunc">resolveEntitySAXFunc</a><br />
 <a href="html/libxml-SAX2.html#xmlSAX2ResolveEntity">xmlSAX2ResolveEntity</a><br />
 </dd><dt>xmlSnprintfElementContent</dt><dd><a href="html/libxml-valid.html#xmlSprintfElementContent">xmlSprintfElementContent</a><br />
-</dd><dt>xmlStrEqual</dt><dd><a href="html/libxml-parser.html#xmlStrEqual">xmlStrEqual</a><br />
+</dd><dt>xmlStrEqual</dt><dd><a href="html/libxml-xmlstring.html#xmlStrEqual">xmlStrEqual</a><br />
 </dd><dt>xmlStrdup</dt><dd><a href="html/libxml-tree.html#xmlNewNode">xmlNewNode</a><br />
 </dd><dt>xmlStringDecodeEntities</dt><dd><a href="html/libxml-parserInternals.html#xmlDecodeEntities">xmlDecodeEntities</a><br />
 </dd><dt>xmlStringGetNodeList</dt><dd><a href="html/libxml-parserInternals.html#xmlParseAttValue">xmlParseAttValue</a><br />
-</dd><dt>xmlStrncat</dt><dd><a href="html/libxml-parser.html#xmlStrncatNew">xmlStrncatNew</a><br />
-</dd><dt>xmlStrncmp</dt><dd><a href="html/libxml-encoding.html#xmlUTF8Charcmp">xmlUTF8Charcmp</a><br />
+</dd><dt>xmlStrncat</dt><dd><a href="html/libxml-xmlstring.html#xmlStrncatNew">xmlStrncatNew</a><br />
+</dd><dt>xmlStrncmp</dt><dd><a href="html/libxml-xmlstring.html#xmlUTF8Charcmp">xmlUTF8Charcmp</a><br />
 </dd><dt>xmlTextReader</dt><dd><a href="html/libxml-xmlreader.html#xmlNewTextReader">xmlNewTextReader</a><br />
 <a href="html/libxml-xmlreader.html#xmlNewTextReaderFilename">xmlNewTextReaderFilename</a><br />
 <a href="html/libxml-xmlreader.html#xmlReaderNewDoc">xmlReaderNewDoc</a><br />