[3720] Updates per review comments

doc/guide/lfc.xml

@@ -14,8 +14,9 @@
       for the memfile data base backend. This service is written to run as a
       stand alone process.  
       </para>
-      <para>While <command>kea-lfc</command> can be started externally it should
-      be started by the Kea DHCP servers.
+      <para>While <command>kea-lfc</command> can be started externally, there is
+      usually no need to do this.  <command>kea-lfc</command> is run on a periodic
+      basis by the Kea DHCP servers.
       </para>
       <para>The process operates on a set of files, using them for input and output
       of the lease entries and to indicate where it is in the process in case of an
@@ -44,8 +45,8 @@ kea-lfc [-4 | -6] -c config-file -p pid-file -x previous-file -i copy-file -o ou
       <para>The <command>-p</command> argument specifies the PID file. When the
       <command>kea-lfc</command> process starts it attempts to determine if another
       instance of the process is already running by examining the pid file.  If one
-      is running it aborts the new process.  If one isn't running it writes its
-      pid into the pid file.
+      is already running the new process is terminated.  If one isn't running it writes
+      its pid into the pid file.
       </para>
 
       <para>The other filenames specify where the <command>kea-lfc</command> process
@@ -64,7 +65,7 @@ kea-lfc [-4 | -6] -c config-file -p pid-file -x previous-file -i copy-file -o ou
           <listitem><simpara>
             <command>input</command> &mdash;
             Before the DHCP server invokes <command>kea-lfc</command> it will
-            copy the current lease file here and then call <command>kea-lfc</command>
+            move the current lease file here and then call <command>kea-lfc</command>
             with this file.
           </simpara></listitem>
 

src/bin/lfc/kea-lfc.xml

@@ -64,8 +64,9 @@
       The <command>kea-lfc</command> service process removes redundant
       information from the files used to provide persistent storage for
       the memfile data base backend.  The service is written to run as
-      a stand alone process.  While it can be started externally it
-      should be started by the Kea DHCP servers as desired and required.
+      a stand alone process.  While it can be started externally, there
+      is usually no need to do this.  It will be run on a periodic basis
+      by the Kea DHCP servers.
     </para>
   </refsect1>
 
@@ -129,9 +130,9 @@
         <listitem><para>
           PID file - When the <command>kea-lfc</command> process starts
           it attempts to determine if another instance of the process is
-          already running by examining the pid file.  If one is running
-          it aborts the new process.  If one isn't running it writes its
-          pid into the pid file.
+          already running by examining the pid file.  If one is already
+          running the new process is terminated.  If one isn't running it
+          writes its pid into the pid file.
         </para></listitem>
       </varlistentry>
 
@@ -150,7 +151,7 @@
         <term><option>-i</option></term>
         <listitem><para>
           Input or copy of lease file - Before the DHCP server invokes
-          <command>kea-lfc</command> it will copy the current lease file
+          <command>kea-lfc</command> it will move the current lease file
           here and then call <command>kea-lfc</command> with this file.
         </para></listitem>
       </varlistentry>