- Update a section of the serial communications Handbook chapter to refer

to uart(4) in FreeBSD 8.X as opposed to the obsolete sio(4).  Keep the
  references to sio(4) but specify that they are for 7.X and older
  releases.  [1]
- Fix some capitalisation convention errors also in the Handbook.

PR:		docs/171529 [1]
Approved by:	gjb, gabor (mentors)

en_US.ISO8859-1/books/handbook/bsdinstall/chapter.sgml

@@ -37,7 +37,7 @@
     </authorgroup>
   </chapterinfo>
 
-  <title>Installing &os;&nbsp;9.<replaceable>x</replaceable> and
+  <title>Installing &os;&nbsp;9.<replaceable>X</replaceable> and
     Later</title>
 
   <sect1 id="bsdinstall-synopsis">

en_US.ISO8859-1/books/handbook/install/chapter.sgml

@@ -27,7 +27,7 @@
     <!-- January 2000 -->
   </chapterinfo>
 
-  <title>Installing &os;&nbsp;8.<replaceable>x</replaceable> and Earlier</title>
+  <title>Installing &os;&nbsp;8.<replaceable>X</replaceable> and Earlier</title>
 
   <sect1 id="install-synopsis">
     <title>Synopsis</title>

en_US.ISO8859-1/books/handbook/serialcomms/chapter.sgml

@@ -547,16 +547,20 @@
 	for messages while the kernel is booting, or use the
 	<command>/sbin/dmesg</command> command to replay the kernel's boot
 	messages.  In particular, look for messages that start with the
-	characters <literal>sio</literal>.</para>
+	characters <literal>uart</literal> if you use &os;&nbsp;8.0 or
+	higher, or <literal>sio</literal> for &os;&nbsp;7.2 or older.</para>
 
       <tip><para>To view just the messages that have the word
-	<literal>sio</literal>, use the command:</para>
+	<literal>uart</literal> or <literal>sio</literal> depending on the
+	installed version of &os;, use the commands:</para>
 
-      <screen>&prompt.root; <userinput>/sbin/dmesg | grep 'sio'</userinput></screen>
+      <screen>&prompt.root; <userinput>/sbin/dmesg | grep 'uart'</userinput>
+&prompt.root; <userinput>/sbin/dmesg | grep 'sio'</userinput></screen>
       </tip>
 
-      <para>For example, on a system with four serial ports, these are the
-	serial-port specific kernel boot messages:</para>
+      <para>For example, on a &os;&nbsp;7.<replaceable>X</replaceable>
+	system with four serial ports, these are the serial-port specific
+	kernel boot messages:</para>
 
       <screen>sio0 at 0x3f8-0x3ff irq 4 on isa
 sio0: type 16550A