doxygen line

src/lib/dns/message.h

@@ -511,6 +511,8 @@ public:
     ///
     /// With EDNS the maximum size can be increased per message.
     static const uint16_t DEFAULT_MAX_UDPSIZE = 512;
+
+    /// \brief The default maximum size of UDP DNS messages we can handle
     static const uint16_t DEFAULT_MAX_EDNS0_UDPSIZE = 4096;
     //@}