diff --git a/plugins/old_plugins/README b/plugins/old_plugins/README
new file mode 100644
index 0000000000000000000000000000000000000000..62cb800d4b4ad54e32f541682828f807b61dcd76
--- /dev/null
+++ b/plugins/old_plugins/README
@@ -0,0 +1,3 @@
+These are old plugins that are no longer used but preserved for posterity.
+
+cas_auth - replaced with cas_auth_unl
\ No newline at end of file
diff --git a/plugins/cas_auth/README.txt b/plugins/old_plugins/cas_auth/README.txt
similarity index 100%
rename from plugins/cas_auth/README.txt
rename to plugins/old_plugins/cas_auth/README.txt
diff --git a/plugins/cas_auth/cas/CAS.php b/plugins/old_plugins/cas_auth/cas/CAS.php
similarity index 100%
rename from plugins/cas_auth/cas/CAS.php
rename to plugins/old_plugins/cas_auth/cas/CAS.php
diff --git a/plugins/cas_auth/cas/PGTStorage/pgt-db.php b/plugins/old_plugins/cas_auth/cas/PGTStorage/pgt-db.php
similarity index 100%
rename from plugins/cas_auth/cas/PGTStorage/pgt-db.php
rename to plugins/old_plugins/cas_auth/cas/PGTStorage/pgt-db.php
diff --git a/plugins/cas_auth/cas/PGTStorage/pgt-file.php b/plugins/old_plugins/cas_auth/cas/PGTStorage/pgt-file.php
similarity index 100%
rename from plugins/cas_auth/cas/PGTStorage/pgt-file.php
rename to plugins/old_plugins/cas_auth/cas/PGTStorage/pgt-file.php
diff --git a/plugins/cas_auth/cas/PGTStorage/pgt-main.php b/plugins/old_plugins/cas_auth/cas/PGTStorage/pgt-main.php
similarity index 100%
rename from plugins/cas_auth/cas/PGTStorage/pgt-main.php
rename to plugins/old_plugins/cas_auth/cas/PGTStorage/pgt-main.php
diff --git a/plugins/cas_auth/cas/client.php b/plugins/old_plugins/cas_auth/cas/client.php
similarity index 100%
rename from plugins/cas_auth/cas/client.php
rename to plugins/old_plugins/cas_auth/cas/client.php
diff --git a/plugins/cas_auth/cas/domxml-php4-php5.php b/plugins/old_plugins/cas_auth/cas/domxml-php4-php5.php
similarity index 100%
rename from plugins/cas_auth/cas/domxml-php4-php5.php
rename to plugins/old_plugins/cas_auth/cas/domxml-php4-php5.php
diff --git a/plugins/cas_auth/cas/languages/english.php b/plugins/old_plugins/cas_auth/cas/languages/english.php
similarity index 100%
rename from plugins/cas_auth/cas/languages/english.php
rename to plugins/old_plugins/cas_auth/cas/languages/english.php
diff --git a/plugins/cas_auth/cas/languages/french.php b/plugins/old_plugins/cas_auth/cas/languages/french.php
similarity index 100%
rename from plugins/cas_auth/cas/languages/french.php
rename to plugins/old_plugins/cas_auth/cas/languages/french.php
diff --git a/plugins/cas_auth/cas/languages/greek.php b/plugins/old_plugins/cas_auth/cas/languages/greek.php
similarity index 100%
rename from plugins/cas_auth/cas/languages/greek.php
rename to plugins/old_plugins/cas_auth/cas/languages/greek.php
diff --git a/plugins/cas_auth/cas/languages/languages.php b/plugins/old_plugins/cas_auth/cas/languages/languages.php
similarity index 100%
rename from plugins/cas_auth/cas/languages/languages.php
rename to plugins/old_plugins/cas_auth/cas/languages/languages.php
diff --git a/plugins/cas_auth/images/connex_cas.gif b/plugins/old_plugins/cas_auth/images/connex_cas.gif
similarity index 100%
rename from plugins/cas_auth/images/connex_cas.gif
rename to plugins/old_plugins/cas_auth/images/connex_cas.gif
diff --git a/plugins/cas_auth/manifest.xml b/plugins/old_plugins/cas_auth/manifest.xml
similarity index 100%
rename from plugins/cas_auth/manifest.xml
rename to plugins/old_plugins/cas_auth/manifest.xml
diff --git a/plugins/cas_auth/start.php b/plugins/old_plugins/cas_auth/start.php
similarity index 100%
rename from plugins/cas_auth/start.php
rename to plugins/old_plugins/cas_auth/start.php
diff --git a/plugins/cas_auth/views/default/account/forms/getemail.php b/plugins/old_plugins/cas_auth/views/default/account/forms/getemail.php
similarity index 100%
rename from plugins/cas_auth/views/default/account/forms/getemail.php
rename to plugins/old_plugins/cas_auth/views/default/account/forms/getemail.php
diff --git a/plugins/cas_auth/views/default/account/forms/login.php b/plugins/old_plugins/cas_auth/views/default/account/forms/login.php
similarity index 100%
rename from plugins/cas_auth/views/default/account/forms/login.php
rename to plugins/old_plugins/cas_auth/views/default/account/forms/login.php
diff --git a/plugins/cas_auth/views/default/account/getemail.php b/plugins/old_plugins/cas_auth/views/default/account/getemail.php
similarity index 100%
rename from plugins/cas_auth/views/default/account/getemail.php
rename to plugins/old_plugins/cas_auth/views/default/account/getemail.php
diff --git a/plugins/cas_auth/views/default/actions/getemail.php b/plugins/old_plugins/cas_auth/views/default/actions/getemail.php
similarity index 100%
rename from plugins/cas_auth/views/default/actions/getemail.php
rename to plugins/old_plugins/cas_auth/views/default/actions/getemail.php
diff --git a/plugins/cas_auth/views/default/settings/cas_auth/edit.php b/plugins/old_plugins/cas_auth/views/default/settings/cas_auth/edit.php
similarity index 100%
rename from plugins/cas_auth/views/default/settings/cas_auth/edit.php
rename to plugins/old_plugins/cas_auth/views/default/settings/cas_auth/edit.php