preparing release of 2.6.18 updated docs and rebuilt reactivated gcc

* NEWS configure.in testapi.c doc/*: preparing release of 2.6.18
  updated docs and rebuilt
* libxml.spec.in: reactivated gcc profiling for gcc >= 4.0.0
Daniel
diff --git a/doc/xml.html b/doc/xml.html
index 41a6636..3dc7fd9 100644
--- a/doc/xml.html
+++ b/doc/xml.html
@@ -715,6 +715,32 @@
 
 <p>There is the list of public releases:</p>
 
+<h3>2.6.18: Mar 13 2005</h3>
+<ul>
+  <li> build fixes: warnings (Peter Breitenlohner), testapi.c generation, 
+       Bakefile support (Francesco Montorsi), Windows compilation (Joel Reed),
+       some gcc4 fixes, HP-UX portability fixes (Rick Jones).</li>
+  <li> bug fixes: xmlSchemaElementDump namespace (Kasimier Buchcik), push and
+       xmlreader stopping on non-fatal errors, thread support for dictionnaries
+       reference counting (Gary Coady), internal subset and push problem, 
+       URL saved in xmlCopyDoc, various schemas bug fixes (Kasimier), Python
+       paths fixup (Stephane Bidoul), xmlGetNodePath and namespaces, 
+       xmlSetNsProp fix (Mike Hommey), warning should not count as error
+       (William Brack), xmlCreatePushParser empty chunk, XInclude parser
+       flags (William), cleanup FTP and HTTP code to reuse the uri parsing
+       and IPv6 (William), xmlTextWriterStartAttributeNS fix (Rob Richards),
+       XMLLINT_INDENT being empty (William), xmlWriter bugs (Rob Richards),
+       multithreading on Windows (Rich Salz), xmlSearchNsByHref fix (Kasimier),
+       Python binding leak (Brent Hendricks), aliasing bug exposed by gcc4
+       on s390, xmlTextReaderNext bug (Rob Richards), Schemas decimal type
+       fixes (William Brack), xmlByteConsumed static buffer (Ben Maurer).</li>
+  <li> improvement: speedup parsing comments and DTDs, dictionnary support for
+       hash tables, Schemas Identity constraints (Kasimier), streaming XPath
+       subset, xmlTextReaderReadString added (Bjorn Reese), Schemas canonical
+       values handling (Kasimier), add xmlTextReaderByteConsumed (Aron
+       Stansvik), </li>
+  <li> Documentation: Wiki support (Joel Reed)
+</ul>
 <h3>2.6.17: Jan 16 2005</h3>
 <ul>
   <li>build fixes: Windows, warnings removal (William Brack),