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/html/libxml-xmlIO.html b/doc/html/libxml-xmlIO.html
index db05e7c..d7d48eb 100644
--- a/doc/html/libxml-xmlIO.html
+++ b/doc/html/libxml-xmlIO.html
@@ -43,7 +43,7 @@
 int	<a href="#xmlInputReadCallback">xmlInputReadCallback</a>		(void * context, <br />					 char * buffer, <br />					 int len)
 </pre>
 <pre class="programlisting"><a href="libxml-tree.html#xmlParserInputPtr">xmlParserInputPtr</a>	<a href="#xmlNoNetExternalEntityLoader">xmlNoNetExternalEntityLoader</a>	(const char * URL, <br />							 const char * ID, <br />							 <a href="libxml-tree.html#xmlParserCtxtPtr">xmlParserCtxtPtr</a> ctxt)</pre>
-<pre class="programlisting"><a href="libxml-tree.html#xmlChar">xmlChar</a> *	<a href="#xmlNormalizeWindowsPath">xmlNormalizeWindowsPath</a>	(const <a href="libxml-tree.html#xmlChar">xmlChar</a> * path)</pre>
+<pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	<a href="#xmlNormalizeWindowsPath">xmlNormalizeWindowsPath</a>	(const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * path)</pre>
 <pre class="programlisting">int	<a href="#xmlOutputBufferClose">xmlOutputBufferClose</a>		(<a href="libxml-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a> out)</pre>
 <pre class="programlisting"><a href="libxml-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a>	<a href="#xmlOutputBufferCreateFd">xmlOutputBufferCreateFd</a>	(int fd, <br />						 <a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a> encoder)</pre>
 <pre class="programlisting"><a href="libxml-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a>	<a href="#xmlOutputBufferCreateFile">xmlOutputBufferCreateFile</a>	(FILE * file, <br />							 <a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a> encoder)</pre>
@@ -134,7 +134,7 @@
 </pre><p>Callback used in the I/O Input API to read the resource</p><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>context</tt></i>:</span></td><td>an Input context</td></tr><tr><td><span class="term"><i><tt>buffer</tt></i>:</span></td><td>the buffer to store data read</td></tr><tr><td><span class="term"><i><tt>len</tt></i>:</span></td><td>the length of the buffer in bytes</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of bytes read or -1 in case of error</td></tr></tbody></table></div><br />
 <h3><a name="xmlNoNetExternalEntityLoader" id="xmlNoNetExternalEntityLoader"></a>Function: xmlNoNetExternalEntityLoader</h3><pre class="programlisting"><a href="libxml-tree.html#xmlParserInputPtr">xmlParserInputPtr</a>	xmlNoNetExternalEntityLoader	(const char * URL, <br />							 const char * ID, <br />							 <a href="libxml-tree.html#xmlParserCtxtPtr">xmlParserCtxtPtr</a> ctxt)<br />
 </pre><p>A specific entity loader disabling network accesses, though still allowing local catalog accesses for resolution.</p>
-<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>URL</tt></i>:</span></td><td>the URL for the entity to load</td></tr><tr><td><span class="term"><i><tt>ID</tt></i>:</span></td><td>the System ID for the entity to load</td></tr><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>the context in which the entity is called or NULL</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a new allocated xmlParserInputPtr, or NULL.</td></tr></tbody></table></div><h3><a name="xmlNormalizeWindowsPath" id="xmlNormalizeWindowsPath"></a>Function: xmlNormalizeWindowsPath</h3><pre class="programlisting"><a href="libxml-tree.html#xmlChar">xmlChar</a> *	xmlNormalizeWindowsPath	(const <a href="libxml-tree.html#xmlChar">xmlChar</a> * path)<br />
+<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>URL</tt></i>:</span></td><td>the URL for the entity to load</td></tr><tr><td><span class="term"><i><tt>ID</tt></i>:</span></td><td>the System ID for the entity to load</td></tr><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>the context in which the entity is called or NULL</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a new allocated xmlParserInputPtr, or NULL.</td></tr></tbody></table></div><h3><a name="xmlNormalizeWindowsPath" id="xmlNormalizeWindowsPath"></a>Function: xmlNormalizeWindowsPath</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	xmlNormalizeWindowsPath	(const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * path)<br />
 </pre><p>This function is obsolete. Please see xmlURIFromPath in uri.c for a better solution.</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>path</tt></i>:</span></td><td>the input file path</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a canonicalized version of the path</td></tr></tbody></table></div><h3><a name="xmlOutputBufferClose" id="xmlOutputBufferClose"></a>Function: xmlOutputBufferClose</h3><pre class="programlisting">int	xmlOutputBufferClose		(<a href="libxml-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a> out)<br />
 </pre><p>flushes and close the output I/O channel and free up all the associated resources</p>
@@ -143,7 +143,7 @@
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>fd</tt></i>:</span></td><td>a file descriptor number</td></tr><tr><td><span class="term"><i><tt>encoder</tt></i>:</span></td><td>the encoding converter or NULL</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new parser output or NULL</td></tr></tbody></table></div><h3><a name="xmlOutputBufferCreateFile" id="xmlOutputBufferCreateFile"></a>Function: xmlOutputBufferCreateFile</h3><pre class="programlisting"><a href="libxml-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a>	xmlOutputBufferCreateFile	(FILE * file, <br />							 <a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a> encoder)<br />
 </pre><p>Create a buffered output for the progressive saving to a FILE * buffered C I/O</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>file</tt></i>:</span></td><td>a FILE*</td></tr><tr><td><span class="term"><i><tt>encoder</tt></i>:</span></td><td>the encoding converter or NULL</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new parser output or NULL</td></tr></tbody></table></div><h3><a name="xmlOutputBufferCreateFilename" id="xmlOutputBufferCreateFilename"></a>Function: xmlOutputBufferCreateFilename</h3><pre class="programlisting"><a href="libxml-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a>	xmlOutputBufferCreateFilename	(const char * URI, <br />							 <a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a> encoder, <br />							 int compression)<br />
-</pre><p>Create a buffered output for the progressive saving of a file If filename is "-' then we use stdout as the output. Automatic support for ZLIB/Compress compressed document is provided by default if found at compile-time. TODO: currently if compression is set, the library only support writing to a local file.</p>
+</pre><p>Create a buffered output for the progressive saving of a file If filename is &quot;-' then we use stdout as the output. Automatic support for ZLIB/Compress compressed document is provided by default if found at compile-time. TODO: currently if compression is set, the library only support writing to a local file.</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>URI</tt></i>:</span></td><td>a C string containing the URI or filename</td></tr><tr><td><span class="term"><i><tt>encoder</tt></i>:</span></td><td>the encoding converter or NULL</td></tr><tr><td><span class="term"><i><tt>compression</tt></i>:</span></td><td>the compression ration (0 none, 9 max).</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new output or NULL</td></tr></tbody></table></div><h3><a name="xmlOutputBufferCreateIO" id="xmlOutputBufferCreateIO"></a>Function: xmlOutputBufferCreateIO</h3><pre class="programlisting"><a href="libxml-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a>	xmlOutputBufferCreateIO	(<a href="libxml-xmlIO.html#xmlOutputWriteCallback">xmlOutputWriteCallback</a> iowrite, <br />						 <a href="libxml-xmlIO.html#xmlOutputCloseCallback">xmlOutputCloseCallback</a> ioclose, <br />						 void * ioctx, <br />						 <a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a> encoder)<br />
 </pre><p>Create a buffered output for the progressive saving to an I/O handler</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>iowrite</tt></i>:</span></td><td>an I/O write function</td></tr><tr><td><span class="term"><i><tt>ioclose</tt></i>:</span></td><td>an I/O close function</td></tr><tr><td><span class="term"><i><tt>ioctx</tt></i>:</span></td><td>an I/O handler</td></tr><tr><td><span class="term"><i><tt>encoder</tt></i>:</span></td><td>the charset encoding if known</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new parser output or NULL</td></tr></tbody></table></div><h3><a name="xmlOutputBufferFlush" id="xmlOutputBufferFlush"></a>Function: xmlOutputBufferFlush</h3><pre class="programlisting">int	xmlOutputBufferFlush		(<a href="libxml-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a> out)<br />
@@ -171,7 +171,7 @@
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>fd</tt></i>:</span></td><td>a file descriptor number</td></tr><tr><td><span class="term"><i><tt>enc</tt></i>:</span></td><td>the charset encoding if known</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new parser input or NULL</td></tr></tbody></table></div><h3><a name="xmlParserInputBufferCreateFile" id="xmlParserInputBufferCreateFile"></a>Function: xmlParserInputBufferCreateFile</h3><pre class="programlisting"><a href="libxml-tree.html#xmlParserInputBufferPtr">xmlParserInputBufferPtr</a>	xmlParserInputBufferCreateFile	(FILE * file, <br />							 <a href="libxml-encoding.html#xmlCharEncoding">xmlCharEncoding</a> enc)<br />
 </pre><p>Create a buffered parser input for the progressive parsing of a FILE * buffered C I/O</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>file</tt></i>:</span></td><td>a FILE*</td></tr><tr><td><span class="term"><i><tt>enc</tt></i>:</span></td><td>the charset encoding if known</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new parser input or NULL</td></tr></tbody></table></div><h3><a name="xmlParserInputBufferCreateFilename" id="xmlParserInputBufferCreateFilename"></a>Function: xmlParserInputBufferCreateFilename</h3><pre class="programlisting"><a href="libxml-tree.html#xmlParserInputBufferPtr">xmlParserInputBufferPtr</a>	xmlParserInputBufferCreateFilename	(const char * URI, <br />							 <a href="libxml-encoding.html#xmlCharEncoding">xmlCharEncoding</a> enc)<br />
-</pre><p>Create a buffered parser input for the progressive parsing of a file If filename is "-' then we use stdin as the input. Automatic support for ZLIB/Compress compressed document is provided by default if found at compile-time. Do an encoding check if enc == <a href="libxml-encoding.html#XML_CHAR_ENCODING_NONE">XML_CHAR_ENCODING_NONE</a></p>
+</pre><p>Create a buffered parser input for the progressive parsing of a file If filename is &quot;-' then we use stdin as the input. Automatic support for ZLIB/Compress compressed document is provided by default if found at compile-time. Do an encoding check if enc == <a href="libxml-encoding.html#XML_CHAR_ENCODING_NONE">XML_CHAR_ENCODING_NONE</a></p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>URI</tt></i>:</span></td><td>a C string containing the URI or filename</td></tr><tr><td><span class="term"><i><tt>enc</tt></i>:</span></td><td>the charset encoding if known</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new parser input or NULL</td></tr></tbody></table></div><h3><a name="xmlParserInputBufferCreateIO" id="xmlParserInputBufferCreateIO"></a>Function: xmlParserInputBufferCreateIO</h3><pre class="programlisting"><a href="libxml-tree.html#xmlParserInputBufferPtr">xmlParserInputBufferPtr</a>	xmlParserInputBufferCreateIO	(<a href="libxml-xmlIO.html#xmlInputReadCallback">xmlInputReadCallback</a> ioread, <br />							 <a href="libxml-xmlIO.html#xmlInputCloseCallback">xmlInputCloseCallback</a> ioclose, <br />							 void * ioctx, <br />							 <a href="libxml-encoding.html#xmlCharEncoding">xmlCharEncoding</a> enc)<br />
 </pre><p>Create a buffered parser input for the progressive parsing for the input from an I/O handler</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ioread</tt></i>:</span></td><td>an I/O read function</td></tr><tr><td><span class="term"><i><tt>ioclose</tt></i>:</span></td><td>an I/O close function</td></tr><tr><td><span class="term"><i><tt>ioctx</tt></i>:</span></td><td>an I/O handler</td></tr><tr><td><span class="term"><i><tt>enc</tt></i>:</span></td><td>the charset encoding if known</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new parser input or NULL</td></tr></tbody></table></div><h3><a name="xmlParserInputBufferCreateMem" id="xmlParserInputBufferCreateMem"></a>Function: xmlParserInputBufferCreateMem</h3><pre class="programlisting"><a href="libxml-tree.html#xmlParserInputBufferPtr">xmlParserInputBufferPtr</a>	xmlParserInputBufferCreateMem	(const char * mem, <br />							 int size, <br />							 <a href="libxml-encoding.html#xmlCharEncoding">xmlCharEncoding</a> enc)<br />
@@ -189,7 +189,7 @@
 <h3><a name="xmlRegisterDefaultOutputCallbacks" id="xmlRegisterDefaultOutputCallbacks"></a>Function: xmlRegisterDefaultOutputCallbacks</h3><pre class="programlisting">void	xmlRegisterDefaultOutputCallbacks	(void)<br />
 </pre><p>Registers the default compiled-in I/O handlers.</p>
 <h3><a name="xmlRegisterHTTPPostCallbacks" id="xmlRegisterHTTPPostCallbacks"></a>Function: xmlRegisterHTTPPostCallbacks</h3><pre class="programlisting">void	xmlRegisterHTTPPostCallbacks	(void)<br />
-</pre><p>By default, libxml submits HTTP output requests using the "PUT" method. Calling this method changes the HTTP output method to use the "POST" method instead.</p>
+</pre><p>By default, libxml submits HTTP output requests using the &quot;PUT&quot; method. Calling this method changes the HTTP output method to use the &quot;POST&quot; method instead.</p>
 <h3><a name="xmlRegisterInputCallbacks" id="xmlRegisterInputCallbacks"></a>Function: xmlRegisterInputCallbacks</h3><pre class="programlisting">int	xmlRegisterInputCallbacks	(<a href="libxml-xmlIO.html#xmlInputMatchCallback">xmlInputMatchCallback</a> matchFunc, <br />					 <a href="libxml-xmlIO.html#xmlInputOpenCallback">xmlInputOpenCallback</a> openFunc, <br />					 <a href="libxml-xmlIO.html#xmlInputReadCallback">xmlInputReadCallback</a> readFunc, <br />					 <a href="libxml-xmlIO.html#xmlInputCloseCallback">xmlInputCloseCallback</a> closeFunc)<br />
 </pre><p>Register a new set of I/O callback for handling parser input.</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>matchFunc</tt></i>:</span></td><td>the <a href="libxml-xmlIO.html#xmlInputMatchCallback">xmlInputMatchCallback</a></td></tr><tr><td><span class="term"><i><tt>openFunc</tt></i>:</span></td><td>the <a href="libxml-xmlIO.html#xmlInputOpenCallback">xmlInputOpenCallback</a></td></tr><tr><td><span class="term"><i><tt>readFunc</tt></i>:</span></td><td>the <a href="libxml-xmlIO.html#xmlInputReadCallback">xmlInputReadCallback</a></td></tr><tr><td><span class="term"><i><tt>closeFunc</tt></i>:</span></td><td>the <a href="libxml-xmlIO.html#xmlInputCloseCallback">xmlInputCloseCallback</a></td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the registered handler number or -1 in case of error</td></tr></tbody></table></div><h3><a name="xmlRegisterOutputCallbacks" id="xmlRegisterOutputCallbacks"></a>Function: xmlRegisterOutputCallbacks</h3><pre class="programlisting">int	xmlRegisterOutputCallbacks	(<a href="libxml-xmlIO.html#xmlOutputMatchCallback">xmlOutputMatchCallback</a> matchFunc, <br />					 <a href="libxml-xmlIO.html#xmlOutputOpenCallback">xmlOutputOpenCallback</a> openFunc, <br />					 <a href="libxml-xmlIO.html#xmlOutputWriteCallback">xmlOutputWriteCallback</a> writeFunc, <br />					 <a href="libxml-xmlIO.html#xmlOutputCloseCallback">xmlOutputCloseCallback</a> closeFunc)<br />