Adjust the redirects for edu and a couple others.

Change-Id: I95049ad68a4ecc31354f9e97e10d83114be8bb78

scripts/app_engine_server/redirects.yaml

@@ -606,18 +606,18 @@ redirects:
   dst: http://www.youtube.com/user/androiddevelopers
   type: permanent
 
-- src: /playbadge
+- src: /playbadge/?$
   dst: http://developer.android.com/distribute/googleplay/promote/badges.html
   type: permanent
 
-- src: /deviceart
+- src: /deviceart/?$
   dst: http://developer.android.com/distribute/promote/device-art.html
   type: permanent
 
-- src: /edu
-  dst: /distribute/googleplay/edu/index.html
-  type: permanent
-
-- src: /edu/signup
+- src: /edu/signup/?$
   dst: https://services.google.com/fb/forms/playedu
   type: permanent
+
+- src: /edu/?$
+  dst: /distribute/googleplay/edu/index.html
+  type: permanent