Delete copy constructor and operator= for Dynamic

This would mess up reference counting and should not be allowed
(it could be implemented correctly, but it would not be efficient
and we do not need it).

Gbp-Dch: ignore

apt-pkg/pkgcachegen.h

@@ -93,6 +93,11 @@ class APT_HIDDEN pkgCacheGenerator					/*{{{*/
       ~Dynamic() {
 	 toReMap.pop_back();
       }
+
+#if __cplusplus >= 201103L
+      Dynamic(const Dynamic&) = delete;
+      void operator=(const Dynamic&) = delete;
+#endif
    };
 
    protected: