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/APIconstructors.html b/doc/APIconstructors.html
index 76f2671..9949bce 100644
--- a/doc/APIconstructors.html
+++ b/doc/APIconstructors.html
@@ -29,9 +29,9 @@
 <a href="html/libxml-SAX2.html#xmlSAX2GetPublicId">xmlSAX2GetPublicId</a><br />
 <a href="html/libxml-SAX2.html#xmlSAX2GetSystemId">xmlSAX2GetSystemId</a><br />
 <a href="html/libxml-tree.html#xmlSplitQName3">xmlSplitQName3</a><br />
-<a href="html/libxml-parser.html#xmlStrcasestr">xmlStrcasestr</a><br />
-<a href="html/libxml-parser.html#xmlStrchr">xmlStrchr</a><br />
-<a href="html/libxml-parser.html#xmlStrstr">xmlStrstr</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrcasestr">xmlStrcasestr</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrchr">xmlStrchr</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrstr">xmlStrstr</a><br />
 <a href="html/libxml-xmlreader.html#xmlTextReaderConstBaseUri">xmlTextReaderConstBaseUri</a><br />
 <a href="html/libxml-xmlreader.html#xmlTextReaderConstLocalName">xmlTextReaderConstLocalName</a><br />
 <a href="html/libxml-xmlreader.html#xmlTextReaderConstName">xmlTextReaderConstName</a><br />
@@ -165,8 +165,8 @@
 <a href="html/libxml-catalog.html#xmlCatalogResolvePublic">xmlCatalogResolvePublic</a><br />
 <a href="html/libxml-catalog.html#xmlCatalogResolveSystem">xmlCatalogResolveSystem</a><br />
 <a href="html/libxml-catalog.html#xmlCatalogResolveURI">xmlCatalogResolveURI</a><br />
-<a href="html/libxml-parser.html#xmlCharStrdup">xmlCharStrdup</a><br />
-<a href="html/libxml-parser.html#xmlCharStrndup">xmlCharStrndup</a><br />
+<a href="html/libxml-xmlstring.html#xmlCharStrdup">xmlCharStrdup</a><br />
+<a href="html/libxml-xmlstring.html#xmlCharStrndup">xmlCharStrndup</a><br />
 <a href="html/libxml-parserInternals.html#xmlDecodeEntities">xmlDecodeEntities</a><br />
 <a href="html/libxml-entities.html#xmlEncodeEntitiesReentrant">xmlEncodeEntitiesReentrant</a><br />
 <a href="html/libxml-entities.html#xmlEncodeSpecialChars">xmlEncodeSpecialChars</a><br />
@@ -197,14 +197,14 @@
 <a href="html/libxml-parserInternals.html#xmlScanName">xmlScanName</a><br />
 <a href="html/libxml-parserInternals.html#xmlSplitQName">xmlSplitQName</a><br />
 <a href="html/libxml-tree.html#xmlSplitQName2">xmlSplitQName2</a><br />
-<a href="html/libxml-parser.html#xmlStrcat">xmlStrcat</a><br />
-<a href="html/libxml-parser.html#xmlStrdup">xmlStrdup</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrcat">xmlStrcat</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrdup">xmlStrdup</a><br />
 <a href="html/libxml-parserInternals.html#xmlStringDecodeEntities">xmlStringDecodeEntities</a><br />
 <a href="html/libxml-parserInternals.html#xmlStringLenDecodeEntities">xmlStringLenDecodeEntities</a><br />
-<a href="html/libxml-parser.html#xmlStrncat">xmlStrncat</a><br />
-<a href="html/libxml-parser.html#xmlStrncatNew">xmlStrncatNew</a><br />
-<a href="html/libxml-parser.html#xmlStrndup">xmlStrndup</a><br />
-<a href="html/libxml-parser.html#xmlStrsub">xmlStrsub</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrncat">xmlStrncat</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrncatNew">xmlStrncatNew</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrndup">xmlStrndup</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrsub">xmlStrsub</a><br />
 <a href="html/libxml-xmlreader.html#xmlTextReaderBaseUri">xmlTextReaderBaseUri</a><br />
 <a href="html/libxml-xmlreader.html#xmlTextReaderGetAttribute">xmlTextReaderGetAttribute</a><br />
 <a href="html/libxml-xmlreader.html#xmlTextReaderGetAttributeNo">xmlTextReaderGetAttributeNo</a><br />
@@ -222,9 +222,9 @@
 <a href="html/libxml-xmlreader.html#xmlTextReaderXmlLang">xmlTextReaderXmlLang</a><br />
 <a href="html/libxml-uri.html#xmlURIEscape">xmlURIEscape</a><br />
 <a href="html/libxml-uri.html#xmlURIEscapeStr">xmlURIEscapeStr</a><br />
-<a href="html/libxml-encoding.html#xmlUTF8Strndup">xmlUTF8Strndup</a><br />
-<a href="html/libxml-encoding.html#xmlUTF8Strpos">xmlUTF8Strpos</a><br />
-<a href="html/libxml-encoding.html#xmlUTF8Strsub">xmlUTF8Strsub</a><br />
+<a href="html/libxml-xmlstring.html#xmlUTF8Strndup">xmlUTF8Strndup</a><br />
+<a href="html/libxml-xmlstring.html#xmlUTF8Strpos">xmlUTF8Strpos</a><br />
+<a href="html/libxml-xmlstring.html#xmlUTF8Strsub">xmlUTF8Strsub</a><br />
 <a href="html/libxml-valid.html#xmlValidCtxtNormalizeAttributeValue">xmlValidCtxtNormalizeAttributeValue</a><br />
 <a href="html/libxml-valid.html#xmlValidNormalizeAttributeValue">xmlValidNormalizeAttributeValue</a><br />
 <a href="html/libxml-xpath.html#xmlXPathCastBooleanToString">xmlXPathCastBooleanToString</a><br />