partial implementation of conference management; rewrote the whole servlets

layer to eliminate duplicate code and make error checking more efficient
(we now use a system that relies on Throwables to do interesting things)

web/format/conferences.jsp

@@ -35,8 +35,7 @@
           <IMG SRC="<%= rdat.getFullImagePath("purple-ball.gif") %>" ALT="*" WIDTH=14 HEIGHT=14 BORDER=0>
         </TD>
         <TD ALIGN=LEFT><%= rdat.getStdFontTag(null,2) %>
-          <% String path = "confdisp?sig=" + String.valueOf(data.getSIGID()) + "&conf="
-                         + String.valueOf(data.getConferenceID(i)); %>
+          <% String path = "confdisp?sig=" + data.getSIGID() + "&conf=" + data.getConferenceID(i); %>
           <A HREF="<%= rdat.getEncodedServletPath(path) %>"><%= StringUtil.encodeHTML(data.getConferenceName(i)) %></A> -
           Latest activity: <%= rdat.getActivityString(data.getLastUpdateDate(i)) %><BR>
           <% int count = data.getNumHosts(i); %>
@@ -59,7 +58,7 @@
 <% if (data.canCreateConference()) { %>
   <P>
   <DIV ALIGN="LEFT">
-    <A HREF="<%= rdat.getEncodedServletPath("confops?cmd=C&sig=" + String.valueOf(data.getSIGID())) %>"><IMG
+    <A HREF="<%= rdat.getEncodedServletPath("confops?cmd=C&sig=" + data.getSIGID()) %>"><IMG
      SRC="<%= rdat.getFullImagePath("bn_create_new.gif") %>" ALT="Create New" WIDTH=80 HEIGHT=24 BORDER=0></A>
   </DIV>
 <% } // end if %>