fix a small initialization problem raised by Ashwin increase testing

* threads.c: fix a small initialization problem raised by Ashwin
* testapi.c gentest.py: increase testing especially for document
  with an internal subset, and entities
* tree.c: fix a deallocation issue when unlinking entities from
  a document.
* valid.c: fix a missing entry point test not found previously.
* doc/*: regenerated the APIs, docs etc.
daniel

svn path=/trunk/; revision=3778
diff --git a/doc/html/libxml-parserInternals.html b/doc/html/libxml-parserInternals.html
index 3c12a6a..d26d52f 100644
--- a/doc/html/libxml-parserInternals.html
+++ b/doc/html/libxml-parserInternals.html
@@ -278,11 +278,11 @@
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XML parser context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the element name parsed</td></tr></tbody></table></div><h3><a name="xmlParseSystemLiteral" id="xmlParseSystemLiteral"></a>Function: xmlParseSystemLiteral</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	xmlParseSystemLiteral	(<a href="libxml-tree.html#xmlParserCtxtPtr">xmlParserCtxtPtr</a> ctxt)<br />
 </pre><p>parse an XML Literal [11] SystemLiteral ::= ('"' [^"]* '"') | ("'" [^']* "'")</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XML parser context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the SystemLiteral parsed or NULL</td></tr></tbody></table></div><h3><a name="xmlParseTextDecl" id="xmlParseTextDecl"></a>Function: xmlParseTextDecl</h3><pre class="programlisting">void	xmlParseTextDecl		(<a href="libxml-tree.html#xmlParserCtxtPtr">xmlParserCtxtPtr</a> ctxt)<br />
-</pre><p>parse an XML declaration header for external entities [77] TextDecl ::= '&lt;?xml' VersionInfo? EncodingDecl S? '?&gt;' Question: Seems that EncodingDecl is mandatory ? Is that a typo ?</p>
+</pre><p>parse an XML declaration header for external entities [77] TextDecl ::= '&lt;?xml' VersionInfo? EncodingDecl S? '?&gt;'</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XML parser context</td></tr></tbody></table></div><h3><a name="xmlParseVersionInfo" id="xmlParseVersionInfo"></a>Function: xmlParseVersionInfo</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	xmlParseVersionInfo	(<a href="libxml-tree.html#xmlParserCtxtPtr">xmlParserCtxtPtr</a> ctxt)<br />
 </pre><p>parse the XML version. [24] VersionInfo ::= S 'version' Eq (' VersionNum ' | " VersionNum ") [25] Eq ::= S? '=' S?</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XML parser context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the version string, e.g. "1.0"</td></tr></tbody></table></div><h3><a name="xmlParseVersionNum" id="xmlParseVersionNum"></a>Function: xmlParseVersionNum</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	xmlParseVersionNum	(<a href="libxml-tree.html#xmlParserCtxtPtr">xmlParserCtxtPtr</a> ctxt)<br />
-</pre><p>parse the XML version value. [26] VersionNum ::= ([a-zA-Z0-9_.:] | '-')+</p>
+</pre><p>parse the XML version value. [26] VersionNum ::= '1.' [0-9]+ In practice allow [0-9].[0-9]+ at that level</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XML parser context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the string giving the XML version number, or NULL</td></tr></tbody></table></div><h3><a name="xmlParseXMLDecl" id="xmlParseXMLDecl"></a>Function: xmlParseXMLDecl</h3><pre class="programlisting">void	xmlParseXMLDecl			(<a href="libxml-tree.html#xmlParserCtxtPtr">xmlParserCtxtPtr</a> ctxt)<br />
 </pre><p>parse an XML declaration header [23] XMLDecl ::= '&lt;?xml' VersionInfo EncodingDecl? SDDecl? S? '?&gt;'</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XML parser context</td></tr></tbody></table></div><h3><a name="xmlParserHandlePEReference" id="xmlParserHandlePEReference"></a>Function: xmlParserHandlePEReference</h3><pre class="programlisting">void	xmlParserHandlePEReference	(<a href="libxml-tree.html#xmlParserCtxtPtr">xmlParserCtxtPtr</a> ctxt)<br />