Added small note about how longtext might be needed for large session data

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2275 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Fixed problem with send_file and WEBrick using stdout #1812
+
 * Optimized tag_options to not sort keys, which is no longer necessary when assert_dom_equal and friend is available #1995 [skae]
 
 * Added assert_dom_equal and assert_dom_not_equal to compare tags generated by the helpers in an order-indifferent manner #1995 [skae]

actionpack/lib/action_controller/session/active_record_store.rb

@@ -12,8 +12,9 @@ class CGI
     # may be used as the backing store.
     #
     # The default assumes a +sessions+ tables with columns +id+ (numeric
-    # primary key), +session_id+ (text), and +data+ (text).  Session data is
-    # marshaled to +data+.  +session_id+ should be indexed for speedy lookups.
+    # primary key), +session_id+ (text, or longtext if your session data exceeds 65K), 
+    # and +data+ (text).  Session data is marshaled to +data+.  +session_id+ should be 
+    # indexed for speedy lookups.
     #
     # Since the default class is a simple Active Record, you get timestamps
     # for free if you add +created_at+ and +updated_at+ datetime columns to