[master] Minor correction in doxygen comments.

 Thanks to wpk for reporting this issue.

src/lib/dhcpsrv/lease.h

@@ -29,10 +29,10 @@ struct Lease {
 
     /// @brief Type of lease or pool
     typedef enum {
-        TYPE_NA = 0, /// the lease contains non-temporary IPv6 address
-        TYPE_TA = 1, /// the lease contains temporary IPv6 address
-        TYPE_PD = 2, /// the lease contains IPv6 prefix (for prefix delegation)
-        TYPE_V4 = 3  /// IPv4 lease
+        TYPE_NA = 0, ///< the lease contains non-temporary IPv6 address
+        TYPE_TA = 1, ///< the lease contains temporary IPv6 address
+        TYPE_PD = 2, ///< the lease contains IPv6 prefix (for prefix delegation)
+        TYPE_V4 = 3  ///< IPv4 lease
     } Type;
 
     /// @brief returns text representation of a lease type