Remove VC insecure warnings on header files.

include/tins/hw_address.h

@@ -222,7 +222,7 @@ public:
      * \return bool indicating whether addresses are equal.
      */
     bool operator==(const HWAddress &rhs) const {
-        return std::equal(begin(), end(), rhs.begin());
+        return std::equal(begin(), end(), rhs.buffer);
     }
     
     /**
@@ -325,13 +325,16 @@ public:
      * But since some PDUs return a HWAddress<> by value, this function
      * can be used to avoid temporaries. 
      * 
-     * \param iter The output iterator in which to store this address.
+     * \param output The output iterator in which to store this address.
      * \return OutputIterator pointing to one-past the last position
      * written.
      */
     template<typename OutputIterator>
-    OutputIterator copy(OutputIterator iter) const {
-        return std::copy(begin(), end(), iter);
+    OutputIterator copy(OutputIterator output) const {
+        for (const_iterator iter = begin(); iter != end(); ++iter) {
+            *output++ = *iter;
+        }
+        return output;
     }
 private:
     template<typename OutputIterator>

include/tins/ipv6_address.h

@@ -137,7 +137,7 @@ public:
      * \return bool indicating whether addresses are equal.
      */
     bool operator==(const IPv6Address &rhs) const {
-        return std::equal(begin(), end(), rhs.begin());
+        return std::equal(begin(), end(), rhs.address);
     }
     
     /**

include/tins/pdu_option.h

@@ -502,11 +502,12 @@ private:
         }
         else {
             payload_.big_buffer_ptr = new data_type[real_size_];
-            std::copy(
-                start, 
-                end,
-                payload_.big_buffer_ptr
-            );
+            uint8_t* ptr = payload_.big_buffer_ptr;
+            while (start < end) {
+                *ptr = *start;
+                ++ptr;
+                ++start;
+            }
         }
     }