[#964,!577] Two trivial fixes as a result of second review.

- Addeed asterisk in the changelog to mark it incompatible change.
- Fixed comma character in the new line.

ChangeLog

+1682.	[bug]*		tmark
+	Added logic to core code and HA hook lib to allow HA peers
+	to detect and handle out of bandwidth socket events.  This
+	corrects a defect introduced in Kea 1.6.0 that can cause
+	an HA server to become unresponsive when an HA socket has
+	been closed by a peer.  Note that there is a change to the
+	signature of the external socket callback handler invoked
+	by IfaceMgr.  Custome hook libraries happen register external
+	sockets with IfaceMgr will require modification and
+	recompilation.
+	(Gitlab #964)
+
 Kea 1.7.1 released on Oct 30, 2019
 
 1681.	[func]		fdupont

src/hooks/dhcp/high_availability/ha_service.h

@@ -747,9 +747,9 @@ protected:
     /// The handler calls @ref HttpClient::closeIfOutOfBandwidth() to catch
     /// and close any sockets that have gone ready outside of transactions.
     ///
-    /// We do this in case the other peer closed the socket (e.g. idle timeout
-    /// for example), as this will cause the socket /appear ready to read to
-    /// the IfaceMgr::select(). If this happens while no transcations are
+    /// We do this in case the other peer closed the socket (e.g. idle timeout),
+    /// as this will cause the socket to appear ready to read to the
+    /// IfaceMgr::select(). If this happens while no transcations are
     /// in progess, we won't have anything to deal with the socket event.
     /// This causes IfaceMgr::select() to endlessly interrupt on the socket.
     ///