Correction to doc/handbook/serialconsole-setup.html

[Matt Thyer]

I've noticed an error in doc/handbook/serialconsole-setup.html (as viewed
at: http://www.freebsd.org/doc/handbook/serialconsole-setup.html).

Section "26.6.6.1" entitled "Setting Up the Serial Console" is specifying
commands that you would type at the loader prompt and suggesting that they
be added to "/boot/loader.conf".  The examples use the "set" keyword when
this should be omitted.

A unified diff to fix the web page would be:

--- serialconsole-setup.html.old        2011-08-07 21:42:08.376155000 +0930
+++ serialconsole-setup.html    2011-08-07 21:43:27.318248588 +0930
@@ -742,7 +742,7 @@
 writing just one line in <tt class="FILENAME">/boot/loader.conf</tt>:</p>

 <pre class="PROGRAMLISTING">
-set console="comconsole"
+console="comconsole"
 </pre>

 <p>This will take effect regardless of the settings in the boot block
discussed in the
@@ -755,7 +755,7 @@
 <p>Likewise, you can specify the internal console as:</p>

 <pre class="PROGRAMLISTING">
-set console="vidconsole"
+console="vidconsole"
 </pre>

 <p>If you do not set the boot loader environment variable <tt
class="ENVAR">console</tt>,