change in procedure to submit comments

I've been receiving way more comments than I'd like that are just people and/or bots looking for some place to put random links (which I don't understand anyway). I'd prefer not to have to pre-approve comments, so I've now enabled an additional feature on the comment form. Everything is the same as before except that now, you'll have to type in a word that it tells you to, which should eliminate most bots since they don't generally recognize that stuff. It shouldn't be too much more to do, and my apologies for the extra step, but so far, I haven't gotten any automated comments, which is nice.

Thanks.