Added documentation for the new pluggable cache filename generation in FileCache
diff --git a/ref/module-httplib2.html b/ref/module-httplib2.html
index 2b660c6..5ead329 100644
--- a/ref/module-httplib2.html
+++ b/ref/module-httplib2.html
@@ -174,6 +174,21 @@
</dl>
<P>
+<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
+ <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-11' xml:id='l2h-11' class="class">FileCache</tt></b>(</nobr></td>
+ <td><var>dir_name, </var><big>[</big><var>safe=safename</var><big>]</big><var></var>)</td></tr></table></dt>
+<dd>
+FileCache implements a Cache as a directory of files.
+The <var>dir_name</var> parameter is
+the name of the directory to use. If the directory does
+not exist then FileCache attempts to create the directory.
+The optional <var>safe</var> parameter is a funtion which generates
+the cache filename for each URI. A FileCache object is
+constructed and used for caching when you pass a directory name
+into the constructor of <tt class="class">Http</tt>.
+</dl>
+
+<P>
<p><br /></p><hr class='online-navigation' />
<div class='online-navigation'>