Bug 236650: Clarify choice of install directory in docs

docs/en/xml/installation.xml

 <!-- <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"> -->
-<!-- $Id: installation.xml,v 1.67 2008/04/04 06:46:57 bugreport%peshkin.net Exp $ -->
+<!-- $Id: installation.xml,v 1.68 2008/04/04 06:46:58 bugreport%peshkin.net Exp $ -->
 <chapter id="installing-bugzilla">
   <title>Installing Bugzilla</title>
 
@@ -149,8 +149,8 @@
 
       <para>
         Download a Bugzilla tarball (or check it out from CVS) and place
-        it in a suitable directory, writable by the default web server user 
-        (probably <quote>nobody</quote>). 
+        it in a suitable directory, accessible by the default web server user 
+        (probably <quote>apache</quote> or <quote>www</quote>). 
         Good locations are either directly in the main web space for your
         web server or perhaps in 
         <filename>/usr/local</filename>
@@ -158,7 +158,7 @@
       </para>
 
       <caution>
-        <para>The default Bugzilla distribution is not designed to be placed
+        <para>The default Bugzilla distribution is NOT designed to be placed
         in a <filename class="directory">cgi-bin</filename> directory. This
         includes any directory which is configured using the
         <option>ScriptAlias</option> directive of Apache.