Improve send/close performance

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@410 42af7a65-404d-4744-a932-0658087f49c3

Documentation/NuttX.html

@@ -734,6 +734,9 @@ Other memory:
 	* Added vsnprintf
 	* Integrated uIP telnetd
 	* Add missing logic to readahead buffer logic
+	* examples/nettest uses larger buffers
+	* Improved ACK handling in send() to better hander deferred acknowledgements
+	  and polling intervals.  Greatly improves send performance.
 </pre></ul>
 
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