[sakai2-tcc] Captcha support 2.8 for new accounts

[csev]

+1 for all the reasons Anthony cited.

It is very simple and off by default and as such not a technical concern
It will not extend our schedule in any way.

On Sep 22, 2010, at 8:25 AM, Anthony Whyte wrote:

> +1  
> 
> 1.  It's off by default which helps mitigate risk.
> 2.  QA supports inclusion.
> 3.  We have branched in mid-September, not mid-November; we have time before the XMas holidays to test it
> 4.  It does not appear "rushed" to me.