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/APIchunk26.html b/doc/APIchunk26.html
index f590601..45c4c01 100644
--- a/doc/APIchunk26.html
+++ b/doc/APIchunk26.html
@@ -188,6 +188,7 @@
 </dd><dt>xmlFreeDoc</dt><dd><a href="html/libxml-xmlreader.html#xmlTextReaderCurrentDoc">xmlTextReaderCurrentDoc</a><br />
 </dd><dt>xmlFreeDocElementContent</dt><dd><a href="html/libxml-valid.html#xmlFreeElementContent">xmlFreeElementContent</a><br />
 </dd><dt>xmlFreeMutex</dt><dd><a href="html/libxml-threads.html#xmlFreeMutex">xmlFreeMutex</a><br />
+</dd><dt>xmlFreeStreamCtxt</dt><dd><a href="html/libxml-pattern.html#xmlPatternGetStreamCtxt">xmlPatternGetStreamCtxt</a><br />
 </dd><dt>xmlGetGlobalState</dt><dd><a href="html/libxml-threads.html#xmlGetGlobalState">xmlGetGlobalState</a><br />
 </dd><dt>xmlGetNoNsProp</dt><dd><a href="html/libxml-tree.html#xmlGetProp">xmlGetProp</a><br />
 </dd><dt>xmlGetNsProp</dt><dd><a href="html/libxml-tree.html#xmlGetProp">xmlGetProp</a><br />
@@ -325,6 +326,9 @@
 </dd><dt>xmlParserProperties</dt><dd><a href="html/libxml-xmlreader.html#xmlTextReaderGetParserProp">xmlTextReaderGetParserProp</a><br />
 <a href="html/libxml-xmlreader.html#xmlTextReaderSetParserProp">xmlTextReaderSetParserProp</a><br />
 </dd><dt>xmlPattern</dt><dd><a href="html/libxml-xmlversion.html#LIBXML_PATTERN_ENABLED">LIBXML_PATTERN_ENABLED</a><br />
+</dd><dt>xmlPatternGetStreamCtxt</dt><dd><a href="html/libxml-pattern.html#xmlPatternStreamable">xmlPatternStreamable</a><br />
+</dd><dt>xmlPatterncompile</dt><dd><a href="html/libxml-pattern.html#xmlStreamPush">xmlStreamPush</a><br />
+<a href="html/libxml-pattern.html#xmlStreamPushAttr">xmlStreamPushAttr</a><br />
 </dd><dt>xmlPopInput:</dt><dd><a href="html/libxml-parserInternals.html#xmlPopInput">xmlPopInput</a><br />
 </dd><dt>xmlPushInput:</dt><dd><a href="html/libxml-parserInternals.html#xmlPushInput">xmlPushInput</a><br />
 </dd><dt>xmlRFreeMutex</dt><dd><a href="html/libxml-threads.html#xmlFreeRMutex">xmlFreeRMutex</a><br />