Licensing of ternary search tree code

[Alex Kiernan]

I've got a pile of changes I haven't committed yet as I've been busy
firefighting, but one of those changes involves dropping in a ternary
search tree library I got from http://www.octavian.org/cs/software.html.

I've mailed Peter (the author of same) privately asking him about the
licensing and got a very helpful and prompt response that "You are
free to do whatever you wish with it."

Is that good enough that I can just drop the code into lib/ and start
using it, or do I need to sort out a proper BSD style license with him
(which I believe he'd be happy to do).

-- 
Alex Kiernan, Principal Engineer, Development, THUS plc