bug 1037082 - part 1/3 dont doauthretry with closed persistent connection r=hurley

netwerk/protocol/http/nsHttpConnection.h

@@ -123,7 +123,7 @@ public:
                            nsIAsyncInputStream **,
                            nsIAsyncOutputStream **);
     void     GetSecurityInfo(nsISupports **);
-    bool     IsPersistent() { return IsKeepAlive(); }
+    bool     IsPersistent() { return IsKeepAlive() && !mDontReuse; }
     bool     IsReused();
     void     SetIsReusedAfter(uint32_t afterMilliseconds);
     nsresult PushBack(const char *data, uint32_t length);