Merge branch '0.9.x' of git@gitorious.org:statusnet/mainline into 0.9.x

lib/util.php

@@ -1416,6 +1416,7 @@ function common_memcache()
             } else {
                 $cache->addServer($servers);
             }
+            $cache->setCompressThreshold(20000, 0.2);
         }
         return $cache;
     }

plugins/CasAuthentication/CasAuthenticationPlugin.php

@@ -34,6 +34,7 @@ if (!defined('STATUSNET') && !defined('LACONICA')) {
 // We bundle the phpCAS library...
 set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib/CAS');
 
+require_once INSTALLDIR.'/plugins/Authentication/AuthenticationPlugin.php';
 class CasAuthenticationPlugin extends AuthenticationPlugin
 {
     public $server;