Updated release notes for HttpClient 4.2

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1337908 13f79535-47bb-0310-9956-ffa450edef68

RELEASE_NOTES.txt

@@ -1,6 +1,26 @@
 Release 4.2
 -------------------
 
+This is the first stable (GA) release of HttpClient 4.2. The most notable enhancements included 
+in this release are:
+
+* New facade API for HttpClient based on the concept of a fluent interface. The fluent API exposes
+  only the most fundamental functions of HttpClient and is intended for relatively simple use cases
+  that do not require the full flexibility of HttpClient. However, the fluent API almost fully
+  relieves the users from having to deal with connection management and resource deallocation.
+
+* Redesigned and rewritten connection management code. 
+
+* Enhanced HTTP authentication API that enables HttpClient to handle more complex authentication
+  scenarios. HttpClient 4.2 is now capable of making use of multiple authentication challenges
+  and retry authentication with a fall-back scheme in case the primary one fails. This can be
+  important for compatibility with Microsoft products that are often configured to use
+  SPNEGO/Kerberos as the preferred authentication scheme.
+
+
+Changelog
+-------------------
+
 * [HTTPCLIENT-1187] If a revalidation response is deemed too old CachingHttpClient fails to  
   consume its content resulting in a connection leak.
   Contributed by Oleg Kalnichevski <olegk at apache.org>
@@ -65,6 +85,7 @@ notable enhancements in HttpClient:
 
 Changelog
 -------------------
+
 * [HTTPCLIENT-1164] Compressed entities are not being cached properly.
   Contributed by Jon Moore <jonm at apache dot org>.