misleading error message on ruby version

[hdm at metasploit.com (H D Moore)]

On Thu, 2009-03-05 at 23:58 +0900, Rhys Kidd wrote:
> The false positive rate on this warning is very low. My understanding
> is that some of the distro's backported the buggy Ruby code into their
> shipping Ruby packages. While annoying, I'm sure some of the more
> proficient Fedora users can guide you on how to get a working Ruby
> interpreter.

I updated the message to be a little more clear and added a warning for
Ruby 1.9.x as well.

-HD