Unblock request for rails

[Adam Majer <adamm@zombino.com>]

Please unblock rails 2.1.0-5 to enter lenny. The only change is a 
security fix applied upstream.

http://groups.google.ca/group/rubyonrails-security/browse_thread/thread/ac8bdb6a54c86139?hl=en

Debian changes are here,
http://git.debian.org/?p=collab-maint/rails.git;a=shortlog;h=refs/heads/debian-lenny

- Adam