Use JobQueue for RPCSub instead of boost::thread

TODO.txt

@@ -40,6 +40,8 @@ David Feature:
 
 --------------------------------------------------------------------------------
 
+- Add convenience variadic functions to JobQueue that do the bind for you
+
 - Consolidate databases
 
 - Figure out why we need WAL sqlite mode if we no longer use sqlite for the node store

modules/ripple_app/rpc/RPCSub.cpp

@@ -112,8 +112,8 @@ void RPCSub::send (const Json::Value& jvObj, bool broadcast)
         mSending    = true;
 
         WriteLog (lsINFO, RPCSub) << boost::str (boost::format ("callRPC start"));
-        boost::thread (BIND_TYPE (&RPCSub::sendThread, this)).detach ();
-    }
-}
         
-// vim:ts=4
+        getApp().getJobQueue ().addJob (
+            jtCLIENT, "RPCSub::sendThread", BIND_TYPE (&RPCSub::sendThread, this));
+    }
+}