[tac_plus] Full AAA logging / supported configuration

[heasley]

Mon, Sep 12, 2016 at 03:03:49PM -0700, Sean:
> Then I misspoke. I thought the key was used for authentication; I didn’t realize it was also being used to encrypt the packets. 
> 
> I’ve got a key configured and in use, but the password(s) were still being logged via `-d 256` in cleartext in /var/log/tac_plus.log when it was running with that level of debugging enabled.

only data on the wire in encrupted