[jreed-docs-2] add some TODO comments

some docs need to be written

src/bin/xfrin/b10-xfrin.xml

@@ -103,6 +103,7 @@ in separate zonemgr process.
       <command>b10-xfrin</command> daemon.
       The list items are:
       <varname>name</varname> (the zone name),
+<!-- TODO: class string -->
       <varname>master_addr</varname> (the zone master to transfer from),
       <varname>master_port</varname> (defaults to 53), and
       <varname>tsig_key</varname> (optional TSIG key to use).

src/bin/xfrout/b10-xfrout.xml

@@ -134,6 +134,14 @@
       data storage types.
     </simpara></note>
 
+
+<!--
+
+tsig_key_ring list of
+tsig_key string
+
+-->
+
 <!-- TODO: formating -->
     <para>
       The configuration commands are: