added help content for http networking, brought over from ns help, bug=143590

suite/locales/en-US/chrome/common/help/cs_nav_prefs_advanced.xhtml

@@ -23,6 +23,7 @@
       <p><a href="#Scripts">Scripts and Windows </a> 
       <p><a href="#Cache">Cache</a> 
       <p><a href="#Proxies">Proxies</a>
+      <p><a href="#HTTP_Networking">HTTP Networking </a>
       <p><a href="#Software_Installation">Software Installation </a> 
       <p><a href="#Mouse_Wheel">Mouse Wheel </a> 
       <p><a href="#system">System</a> 
@@ -173,6 +174,41 @@
     configuration file or URL, then type the configuration URL.</li>
 </ul>
 <p>&nbsp;</p><hr>
+
+
+<a name="HTTP_Networking"></a>
+<a name="keep-aliveSDX"></a> <a name="pipeliningSDX"></a> <a name="keep-aliveSDX"></a> 
+<a name="HTTP_Networking:preferencesIDX"></a> <a name="preferences:HTTP_NetworkingIDX"></a> 
+<h2>Advanced Preferences - HTTP Networking</h2>
+<p>This section describes how to use the HTTP Networking preferences panel. If 
+you're not already viewing it, follow these steps: 
+<p> 1. Open the Edit menu and choose Preferences.<br>
+2. Under the Advanced category, click HTTP Networking. (If no subcategories are 
+visible, double-click Advanced to expand the list.)</p>
+<p><br></p>
+<p>The HTTP Networking preferences panel is used to configure HTTP-based networking:</p>
+<ul>
+<li><b>Direct Connection Options, Proxy Connection Options: </b>Choose the HTTP 
+version and options for direct and proxy connections. 
+<ul>
+<li><b>Use HTTP 1.0</b>: Choose this to use the original version of HTTP, standardized 
+in 1996.</li>
+<li><b>Use HTTP 1.1</b>: Choose this to use the new version of HTTP, which offers 
+performance enhancements, including more efficient use of HTTP connections, better 
+support for client-side caching, multiple HTTP requests (pipelining), and more 
+refined control over cache expiration and replacement policies.</li>
+<li><b>Enable Keep-Alive</b>: Select this to keep a connection open to make additional 
+HTTP requests, increasing speed.</li>
+<li><b>Enable Pipelining</b>:<b> </b>Select this to enable pipelining, which 
+allows for more than one HTTP request to be sent to the server at once, reducing 
+delays loading web pages.<br>
+<b>Note</b>: Pipelining is only available with HTTP 1.1.</li>
+</ul>
+</li>
+</ul>
+<p>&nbsp;</p>
+<hr>
+
 <a name="software_installation:preferencesIDX"></a>
 <a name="preferences:software_installationIDX"></a> 
 <a name="Software_Installation"></a>