documentation fix for checked-in change in 46490, sr=sfraser, r=me, author=diego biurrun, with dispensation for content updates per 122806

extensions/help/resources/locale/en-US/cs_nav_prefs_advanced.html

@@ -65,8 +65,11 @@
   <li><b> Disk Cache</b>: Type in the amount of disk cache, and disk cache you 
     want to allocate for Mozilla. Disk cache is saved to your hard disk (drive) 
     and can be used again.</li>
+  <li><b> Disk Cache Folder</b>: The folder where you want Mozilla to store your
+    disk cache (empty if you do not change the default).</li>
   <li><b>Clear Memory Cache: </b>Click this to clear the memory cache.</li>
   <li><b>Clear Disk Cache</b>: Click this to clear the memory cache.</li>
+ <li><b>Choose Folder</b>: Click this to choose the disk cache folder.</li>
   <li><b>Compare the page in the cache to the page on the network:</b> 
     <ul>
       <li><b>Every time I view the page</b>: Select this if you want Mozilla 

extensions/help/resources/locale/en-US/cs_nav_prefs_advanced.xhtml

@@ -65,8 +65,11 @@
   <li><b> Disk Cache</b>: Type in the amount of disk cache, and disk cache you 
     want to allocate for Mozilla. Disk cache is saved to your hard disk (drive) 
     and can be used again.</li>
+  <li><b> Disk Cache Folder</b>: The folder where you want Mozilla to store your
+    disk cache (empty if you do not change the default).</li>
   <li><b>Clear Memory Cache: </b>Click this to clear the memory cache.</li>
   <li><b>Clear Disk Cache</b>: Click this to clear the memory cache.</li>
+ <li><b>Choose Folder</b>: Click this to choose the disk cache folder.</li>
   <li><b>Compare the page in the cache to the page on the network:</b> 
     <ul>
       <li><b>Every time I view the page</b>: Select this if you want Mozilla