Add proxy rule for wiki for local testing of split servers

proxy/nginx.conf

@@ -61,6 +61,11 @@ http {
       location /courses/MITx/6.002x/2012_Fall/ {
         proxy_pass http://course_mitx_6002_2012_fall;
       }
+
+      location ~ /courses/([^/]*)/([^/]*)/([^/]*)/(course_wiki|wiki) {
+        proxy_pass http://portal;
+      }
+
     }
 }