[trac3808] Updates per review comments round 2

Add the ChangeLog entry

Update the documentation to change the underscores to hyphens

ChangeLog

@@ -1,3 +1,10 @@
+xxx	[func]		sar
+	Split the DHCP-DDNS logging messages amongst several loggers to
+	allow the administrator finer control over debugging messages.
+	Messages pertaining to the name change requests processing include
+	an ID, currently the DHCID, to identify the transactions.
+	(Trac #3808, git <TBD>)
+
 929	[build]		fdupont
 	Corrected problem in build system whereby specifying an
 	installation directory on the "configure" command line that

doc/guide/logging.xml

@@ -236,13 +236,13 @@
             for libraries used by the deamon.</simpara>
           </listitem>
           <listitem>
-            <simpara><command>kea-dhcp-ddns.dhcp_to_d2</command> - this is the logger
+            <simpara><command>kea-dhcp-ddns.dhcp-to-d2</command> - this is the logger
             used by the kea-dhcp-ddns deamon for logging information about events
             dealing with receving messages from the DHCP servers and adding them
             to the queue for processing.</simpara>
           </listitem>
           <listitem>
-            <simpara><command>kea-dhcp-ddns.d2_to_dns</command> - this is the logger
+            <simpara><command>kea-dhcp-ddns.d2-to-dns</command> - this is the logger
             used by the kea-dhcp-ddns deamon for logging information about events
             dealing with sending and receiving messages with the DNS servers.
             </simpara>