THRIFT-970. java: Under heavy load, THttpClient may fail with 'too many open files'

This patch updates our THttpClient to have two different modes of operation: its current functionality and a new mode that uses Apache's HttpClient library to provide higher throughput and better pooling functionality.

Patch: Mathias Herberts

git-svn-id: https://svn.apache.org/repos/asf/thrift/trunk@1031668 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/java/ivy.xml b/lib/java/ivy.xml
index cff7136..99ef972 100644
--- a/lib/java/ivy.xml
+++ b/lib/java/ivy.xml
@@ -33,5 +33,6 @@
        <dependency org="commons-lang" name="commons-lang" rev="2.5" conf="* -> *,!sources,!javadoc"/>
        <dependency org="junit" name="junit" rev="4.4" conf="test -> *,!sources,!javadoc"/>
        <dependency org="javax.servlet" name="servlet-api" rev="2.5" conf="* -> *,!sources,!javadoc"/>
+       <dependency org="org.apache.httpcomponents" name="httpclient" rev="4.0.1" conf="* -> *,!sources,!javadoc"/>
     </dependencies>
 </ivy-module>