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/APIchunk5.html b/doc/APIchunk5.html
index a61316d..cc40b20 100644
--- a/doc/APIchunk5.html
+++ b/doc/APIchunk5.html
@@ -131,7 +131,7 @@
 </dd><dt>People</dt><dd><a href="html/libxml-entities.html#xmlEncodeEntities">xmlEncodeEntities</a><br />
 </dd><dt>PhoneticExtensions</dt><dd><a href="html/libxml-xmlunicode.html#xmlUCSIsPhoneticExtensions">xmlUCSIsPhoneticExtensions</a><br />
 </dd><dt>Please</dt><dd><a href="html/libxml-xmlIO.html#xmlNormalizeWindowsPath">xmlNormalizeWindowsPath</a><br />
-</dd><dt>Pointer</dt><dd><a href="html/libxml-encoding.html#xmlCheckUTF8">xmlCheckUTF8</a><br />
+</dd><dt>Pointer</dt><dd><a href="html/libxml-xmlstring.html#xmlCheckUTF8">xmlCheckUTF8</a><br />
 </dd><dt>Points</dt><dd><a href="html/libxml-xpointer.html#xmlXPtrNewRangePoints">xmlXPtrNewRangePoints</a><br />
 </dd><dt>Pop</dt><dd><a href="html/libxml-relaxng.html#xmlRelaxNGValidatePopElement">xmlRelaxNGValidatePopElement</a><br />
 <a href="html/libxml-valid.html#xmlValidatePopElement">xmlValidatePopElement</a><br />
@@ -238,7 +238,7 @@
 <a href="html/libxml-parserInternals.html#xmlSplitQName">xmlSplitQName</a><br />
 <a href="html/libxml-tree.html#xmlSplitQName2">xmlSplitQName2</a><br />
 <a href="html/libxml-tree.html#xmlSplitQName3">xmlSplitQName3</a><br />
-<a href="html/libxml-parser.html#xmlStrQEqual">xmlStrQEqual</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrQEqual">xmlStrQEqual</a><br />
 <a href="html/libxml-tree.html#xmlValidateQName">xmlValidateQName</a><br />
 </dd><dt>QNames</dt><dd><a href="html/libxml-hash.html#xmlHashQLookup2">xmlHashQLookup2</a><br />
 </dd><dt>QUIT</dt><dd><a href="html/libxml-nanoftp.html#xmlNanoFTPQuit">xmlNanoFTPQuit</a><br />