Feature/config diff between 1.3/1.4, MySQL ACLs?

Hi, I was wondering if there was a link to a 'manager-friendly' list of differences/changes/fixes between 1.3.X stable and 1.4.X stable? Particuarly if there are any new deprecated configs (or outright config breakages, as I've had at various times with OpenLDAP or Samba)..

'errorfile' behavior for ACL rules?

Hi, I was wondering if there was support within haproxy to return the content of a file as a result of an ACL, similar to how 'errorfile' returns the content of a file when haproxy gets that error from the underlying? For example, I want this to do what I mean: acl under_construction