[2949] Miscellaneous edits to the "DHCPv6 Stateless Configuration" section

doc/guide/dhcp6-srv.xml

@@ -1741,27 +1741,30 @@ should include options from the isc option space:
 
     <section id="stateless-dhcp6">
       <title>Stateless DHCPv6 (Information-Request Message)</title>
-      <para>Typically DHCPv6 is used to assign addresses and options. Those
-      assignments (leases) have state that changes state over time, hence
-      their name stateful. DHCPv6 also supports stateless mode,
-      where clients simply request configuration options. This mode is
-      considered lightweight from the server perspective, as it does require
-      any state tracking. Hence its name.</para>
-      <para>Kea server supports this mode out of the box. Clients may send
-      Information-Request messages and the server will simply send back answers
-      with requested options, if they are available in the server configuration.
-      The server will attempt to use per subnet options first. If that fails for
-      whatever reason, it will then try to provide options defined in the global
-      scope.</para>
-      <para>Stateless and stateful mode can be used together. No special configuration
-      directives are required to handle this. Simply use the configuration for
-      stateful clients and the stateless clients will get just options they requested.
-      </para>
-      <para>This usage of global options brings in an interesting observation.
-      It is possible to run the server that provides just options and no addresses
-      or prefixes. If the options have the same value in each subnet, the configuration
-      may simply define required options in the global scope and skip subnet
-      definitions altogether. Here's an example of such very simple configuration:
+      <para>Typically DHCPv6 is used to assign both addresses and options. These
+      assignments (leases) have state that changes over time, hence
+      their name, stateful. DHCPv6 also supports a stateless mode,
+      where clients request configuration options only. This mode is
+      considered lightweight from the server perspective, as it does not require
+      any state tracking; hence its name.</para>
+      <para>The Kea server supports stateless mode. Clients can send
+      Information-Request messages and the server will send back
+      answers with the requested options (providing the options are
+      available in the server configuration).  The server will attempt to
+      use per-subnet options first. If that fails - for whatever reason - it
+      will then try to provide options defined in the global scope.</para>
+
+      <para>Stateless and stateful mode can be used together. No special
+      configuration directives are required to handle this. Simply use the
+      configuration for stateful clients and the stateless clients will get
+      just options they requested.</para>
+
+      <para>This usage of global options allows for an interesting case.
+      It is possible to run a server that provides just options and no
+      addresses or prefixes. If the options have the same value in each
+      subnet, the configuration can define required options in the global
+      scope and skip subnet definitions altogether. Here's a simple example of
+      such a configuration:
 <screen>
 "Dhcp6": {
     "interfaces": [ "ethX" ],
@@ -1772,10 +1775,11 @@ should include options from the isc option space:
     "lease-database": { "type": "memfile" }
  }
 </screen>
-      This very simple configuration will provide DNS servers information to all
-      clients in the network, regardless of their location. Note that as of 0.9.1,
-      Kea requires lease-database to be specified, even if it is not used.
-      </para>
+      This very simple configuration will provide DNS server information
+      to all clients in the network, regardless of their location. Note the
+      specification of the memfile lease database: this is required since,
+      as of version 0.9.1, Kea requires a lease database to be specified
+      even if it is not used.</para>
     </section>
 
     <section id="dhcp6-relay-override">