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/APIchunk24.html b/doc/APIchunk24.html
index 8f571cf..b2d1116 100644
--- a/doc/APIchunk24.html
+++ b/doc/APIchunk24.html
@@ -68,7 +68,7 @@
 </dd><dt>uniqueness</dt><dd><a href="html/libxml-valid.html#xmlValidateAttributeDecl">xmlValidateAttributeDecl</a><br />
 <a href="html/libxml-valid.html#xmlValidateOneAttribute">xmlValidateOneAttribute</a><br />
 <a href="html/libxml-valid.html#xmlValidateOneNamespace">xmlValidateOneNamespace</a><br />
-</dd><dt>units</dt><dd><a href="html/libxml-encoding.html#xmlUTF8Strsub">xmlUTF8Strsub</a><br />
+</dd><dt>units</dt><dd><a href="html/libxml-xmlstring.html#xmlUTF8Strsub">xmlUTF8Strsub</a><br />
 </dd><dt>unknown</dt><dd><a href="html/libxml-schemasInternals.html#XML_SCHEMAS_ANYATTR_SKIP">XML_SCHEMAS_ANYATTR_SKIP</a><br />
 <a href="html/libxml-schemasInternals.html#XML_SCHEMAS_FACET_UNKNOWN">XML_SCHEMAS_FACET_UNKNOWN</a><br />
 <a href="html/libxml-HTMLparser.html#htmlCtxtUseOptions">htmlCtxtUseOptions</a><br />
@@ -148,7 +148,7 @@
 <a href="html/libxml-parserInternals.html#xmlNamespaceParseQName">xmlNamespaceParseQName</a><br />
 <a href="html/libxml-parserInternals.html#xmlSplitQName">xmlSplitQName</a><br />
 <a href="html/libxml-tree.html#xmlSplitQName2">xmlSplitQName2</a><br />
-</dd><dt>updates</dt><dd><a href="html/libxml-encoding.html#xmlGetUTF8Char">xmlGetUTF8Char</a><br />
+</dd><dt>updates</dt><dd><a href="html/libxml-xmlstring.html#xmlGetUTF8Char">xmlGetUTF8Char</a><br />
 </dd><dt>upon</dt><dd><a href="html/libxml-SAX.html#checkNamespace">checkNamespace</a><br />
 <a href="html/libxml-xlink.html#xlinkNodeDetectFunc">xlinkNodeDetectFunc</a><br />
 </dd><dt>upper</dt><dd><a href="html/libxml-valid.html#xmlIsRef">xmlIsRef</a><br />
@@ -204,7 +204,7 @@
 <a href="html/libxml-valid.html#xmlValidateNotationDecl">xmlValidateNotationDecl</a><br />
 <a href="html/libxml-valid.html#xmlValidityErrorFunc">xmlValidityErrorFunc</a><br />
 <a href="html/libxml-valid.html#xmlValidityWarningFunc">xmlValidityWarningFunc</a><br />
-</dd><dt>value:</dt><dd><a href="html/libxml-encoding.html#xmlCheckUTF8">xmlCheckUTF8</a><br />
+</dd><dt>value:</dt><dd><a href="html/libxml-xmlstring.html#xmlCheckUTF8">xmlCheckUTF8</a><br />
 </dd><dt>values:</dt><dd><a href="html/libxml-tree.html#xmlSetCompressMode">xmlSetCompressMode</a><br />
 <a href="html/libxml-tree.html#xmlSetDocCompressMode">xmlSetDocCompressMode</a><br />
 <a href="html/libxml-valid.html#xmlValidCtxtNormalizeAttributeValue">xmlValidCtxtNormalizeAttributeValue</a><br />