[Gas] typo fixed

[Zachary C. Miller]

there was a typo in Gas::AuthManager with the new "encryption_method"
code. in the default case where crypt was being used the element of
$self that was being set was mispelled and so the default case wasn't
working. Watch out for transposed letters and test code before
checking in!

Thanks.

-- 
Zachary C. Miller - @= - http://wolfgang.groogroo.com/
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