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/APIchunk8.html b/doc/APIchunk8.html
index 854a05a..4896feb 100644
--- a/doc/APIchunk8.html
+++ b/doc/APIchunk8.html
@@ -334,8 +334,8 @@
 <a href="html/libxml-tree.html#xmlSaveFormatFile">xmlSaveFormatFile</a><br />
 <a href="html/libxml-tree.html#xmlSaveFormatFileEnc">xmlSaveFormatFileEnc</a><br />
 <a href="html/libxml-tree.html#xmlSaveFormatFileTo">xmlSaveFormatFileTo</a><br />
-<a href="html/libxml-parser.html#xmlStrcat">xmlStrcat</a><br />
-<a href="html/libxml-parser.html#xmlStrncat">xmlStrncat</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrcat">xmlStrcat</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrncat">xmlStrncat</a><br />
 <a href="html/libxml-xpathInternals.html#xmlXPathNodeSetMerge">xmlXPathNodeSetMerge</a><br />
 <a href="html/libxml-xpointer.html#xmlXPtrLocationSetMerge">xmlXPtrLocationSetMerge</a><br />
 </dd><dt>adding</dt><dd><a href="html/libxml-catalog.html#xmlLoadSGMLSuperCatalog">xmlLoadSGMLSuperCatalog</a><br />
@@ -403,8 +403,6 @@
 <a href="html/libxml-tree.html#xmlBuildQName">xmlBuildQName</a><br />
 <a href="html/libxml-xmlmemory.html#xmlMallocAtomicLoc">xmlMallocAtomicLoc</a><br />
 <a href="html/libxml-xmlmemory.html#xmlMallocLoc">xmlMallocLoc</a><br />
-<a href="html/libxml-xmlmemory.html#xmlMemMalloc">xmlMemMalloc</a><br />
-<a href="html/libxml-xmlmemory.html#xmlMemRealloc">xmlMemRealloc</a><br />
 <a href="html/libxml-threads.html#xmlNewMutex">xmlNewMutex</a><br />
 <a href="html/libxml-threads.html#xmlNewRMutex">xmlNewRMutex</a><br />
 <a href="html/libxml-xmlmemory.html#xmlReallocLoc">xmlReallocLoc</a><br />
@@ -413,10 +411,7 @@
 <a href="html/libxml-tree.html#xmlGetBufferAllocationScheme">xmlGetBufferAllocationScheme</a><br />
 <a href="html/libxml-xmlmemory.html#xmlMallocAtomicLoc">xmlMallocAtomicLoc</a><br />
 <a href="html/libxml-xmlmemory.html#xmlMallocLoc">xmlMallocLoc</a><br />
-<a href="html/libxml-xmlmemory.html#xmlMemMalloc">xmlMemMalloc</a><br />
-<a href="html/libxml-xmlmemory.html#xmlMemRealloc">xmlMemRealloc</a><br />
 <a href="html/libxml-xmlmemory.html#xmlMemStrdupLoc">xmlMemStrdupLoc</a><br />
-<a href="html/libxml-xmlmemory.html#xmlMemoryStrdup">xmlMemoryStrdup</a><br />
 <a href="html/libxml-uri.html#xmlNormalizeURIPath">xmlNormalizeURIPath</a><br />
 <a href="html/libxml-xmlmemory.html#xmlReallocLoc">xmlReallocLoc</a><br />
 <a href="html/libxml-tree.html#xmlSetBufferAllocationScheme">xmlSetBufferAllocationScheme</a><br />
@@ -433,7 +428,7 @@
 <a href="html/libxml-HTMLparser.html#htmlAttrAllowed">htmlAttrAllowed</a><br />
 <a href="html/libxml-HTMLparser.html#htmlNodeStatus">htmlNodeStatus</a><br />
 <a href="html/libxml-xmlautomata.html#xmlAutomataNewAllTrans">xmlAutomataNewAllTrans</a><br />
-<a href="html/libxml-encoding.html#xmlCheckUTF8">xmlCheckUTF8</a><br />
+<a href="html/libxml-xmlstring.html#xmlCheckUTF8">xmlCheckUTF8</a><br />
 <a href="html/libxml-parser.html#xmlCreatePushParserCtxt">xmlCreatePushParserCtxt</a><br />
 <a href="html/libxml-parser.html#xmlKeepBlanksDefault">xmlKeepBlanksDefault</a><br />
 <a href="html/libxml-tree.html#xmlNewDocNode">xmlNewDocNode</a><br />
@@ -598,8 +593,6 @@
 </dd><dt>area</dt><dd><a href="html/libxml-tree.html#xmlBufferCreateStatic">xmlBufferCreateStatic</a><br />
 <a href="html/libxml-xmlmemory.html#xmlMallocAtomicLoc">xmlMallocAtomicLoc</a><br />
 <a href="html/libxml-xmlmemory.html#xmlMallocLoc">xmlMallocLoc</a><br />
-<a href="html/libxml-xmlmemory.html#xmlMemMalloc">xmlMemMalloc</a><br />
-<a href="html/libxml-xmlmemory.html#xmlMemRealloc">xmlMemRealloc</a><br />
 <a href="html/libxml-xmlIO.html#xmlParserInputBufferCreateMem">xmlParserInputBufferCreateMem</a><br />
 <a href="html/libxml-xmlIO.html#xmlParserInputBufferCreateStatic">xmlParserInputBufferCreateStatic</a><br />
 <a href="html/libxml-xmlmemory.html#xmlReallocLoc">xmlReallocLoc</a><br />
@@ -617,9 +610,9 @@
 </dd><dt>arrays</dt><dd><a href="html/libxml-parser.html#_xmlParserCtxt">_xmlParserCtxt</a><br />
 </dd><dt>arry</dt><dd><a href="html/libxml-xmlIO.html#xmlParserInputBufferPush">xmlParserInputBufferPush</a><br />
 </dd><dt>asked</dt><dd><a href="html/libxml-parserInternals.html#xmlParseReference">xmlParseReference</a><br />
-</dd><dt>assume</dt><dd><a href="html/libxml-parser.html#xmlStrcat">xmlStrcat</a><br />
-<a href="html/libxml-parser.html#xmlStrdup">xmlStrdup</a><br />
-</dd><dt>assumed</dt><dd><a href="html/libxml-encoding.html#xmlCheckUTF8">xmlCheckUTF8</a><br />
+</dd><dt>assume</dt><dd><a href="html/libxml-xmlstring.html#xmlStrcat">xmlStrcat</a><br />
+<a href="html/libxml-xmlstring.html#xmlStrdup">xmlStrdup</a><br />
+</dd><dt>assumed</dt><dd><a href="html/libxml-xmlstring.html#xmlCheckUTF8">xmlCheckUTF8</a><br />
 </dd><dt>assuming</dt><dd><a href="html/libxml-tree.html#xmlSaveFileTo">xmlSaveFileTo</a><br />
 <a href="html/libxml-tree.html#xmlSaveFormatFileTo">xmlSaveFormatFileTo</a><br />
 </dd><dt>atomic</dt><dd><a href="html/libxml-xmlmemory.html#xmlGcMemGet">xmlGcMemGet</a><br />