[reSIProcate] [Patch] Fix for gcc-4.2.3 concept check failure in dum

[Brad Spencer <spencer@xxxxxxxxxxxxx>]

I encountered a small issue in resip/dum/MergedRequestKey.hxx where it
seems instances of the class are put into a container that requires it
to be Assignable.  This seems to do this trick.  It's against 1.4.

-- 
----------------------------------------------------------
Brad Spencer - spencer@xxxxxxxxxxxxx - www.starscale.com

diff -ur orig/resip/dum/MergedRequestKey.hxx resiprocate-1.4/resip/dum/MergedRequestKey.hxx
--- orig/resip/dum/MergedRequestKey.hxx	2006-11-10 13:43:02.000000000 -0400
+++ resiprocate-1.4/resip/dum/MergedRequestKey.hxx	2008-11-12 21:05:50.000000000 -0400
@@ -21,9 +21,6 @@
       static const MergedRequestKey Empty;
 
    private:
-      //MergedRequestKey(const MergedRequestKey& key);
-      MergedRequestKey& operator=(const MergedRequestKey& key);
-      
       Data mRequestUri;
       Data mCSeq;
       Data mTag;
diff -ur orig/resip/stack/DnsInterface.cxx resiprocate-1.4/resip/stack/DnsInterface.cxx

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