broke out the object cache functionality; generalized ReadOnlyVector;

finally implemented background sweeps of unreferenced cache objects;
anonymous user, when viewing profiles, now sees them as if all "privacy"
flags were switched on

web/format/top_content.jsp

@@ -28,7 +28,7 @@
 <% if (rdat.useHTMLComments()) { %><!-- Top content panel --><% } %>
 <% if (data.displayWelcome()) { %>
   <% rdat.writeContentHeader(out,rdat.getStockMessage("welcome-top"),null); %>
-  <%= rdat.getStdFontTag(null,1) %><%= rdat.getStockMessage(out,"welcome"); %></FONT><P>
+  <%= rdat.getStdFontTag(null,1) %><%= rdat.getStockMessage("welcome") %></FONT><P>
 <% } // end if %>
 <% rdat.writeContentHeader(out,rdat.getStockMessage("currents-top"),null); %>
 <% int ntp = data.getNumTopPosts(); %>