[rfa/cli] Accept ambiguious enum when an exact match

[Andrew Cagney]

Fernando Nasser wrote:
> 
> Andrew,
> 
> You just removed an item from my TODO list.  I discovered this 2 weeks ago
> and I was going to fix it after the 12th.
> 
> Please check it in.
> 
> Thank you.

Oops!  Thanks.

	Andrew