supports_disable_referential_integrity? is wrong

supports_disable_referential_integrity? in postgresql adapter on 2.3 stable looks like this:

 def supports_disable_referential_integrity?() #:nodoc:
    version = query("SHOW server_version")[0][0].split('.')
    (version[0].to_i >= 8 && version[1].to_i >= 1) ? true : false
  rescue
    return false
  end

So it returns false for 9.0.x , which is wrong.

The correct version is in 3.0 branch:

 def supports_disable_referential_integrity?()
   postgresql_version >= 80100
 end

Anybody cares to backpatch?