contrib: epee: add exception spec to throwing destructors

The destructors get a noexcept(true) spec by default, but these
destructors in fact throw exceptions. An alternative fix might be to not
throw (most if not all of these throws are non-essential
error-reporting/logging).

contrib/epee/include/net/abstract_tcp_server2.inl

@@ -88,7 +88,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
 PRAGMA_WARNING_DISABLE_VS(4355)
   //---------------------------------------------------------------------------------
   template<class t_protocol_handler>
-  connection<t_protocol_handler>::~connection()
+  connection<t_protocol_handler>::~connection() noexcept(false)
   {
     if(!m_was_shutdown)
     {

contrib/epee/include/net/net_utils_base.h

@@ -119,7 +119,7 @@ namespace net_utils
     virtual bool add_ref()=0;
     virtual bool release()=0;
   protected:
-    virtual ~i_service_endpoint(){}
+    virtual ~i_service_endpoint() noexcept(false) {}
 	};
 
 

contrib/epee/include/storages/portable_storage_from_bin.h

@@ -68,7 +68,7 @@ namespace epee
           ++m_counter_ref;
           CHECK_AND_ASSERT_THROW_MES(m_counter_ref < EPEE_PORTABLE_STORAGE_RECURSION_LIMIT_INTERNAL, "Wrong blob data in portable storage: recursion limitation (" << EPEE_PORTABLE_STORAGE_RECURSION_LIMIT_INTERNAL << ") exceeded");
         }
-        ~recursuion_limitation_guard()
+        ~recursuion_limitation_guard() noexcept(false)
         {
           CHECK_AND_ASSERT_THROW_MES(m_counter_ref != 0, "Internal error: m_counter_ref == 0 while ~recursuion_limitation_guard()");
           --m_counter_ref;