Changes:
* standardized "comment" wording
* made difference between "get comment email" and "get email for MY comments" more clear
* toned down the "mangle displayed email address" to be "less of a chance" and not "no chance"
* toned down the block-spiders-and-robots to be "less of a chance" and not "no chance"
* clarified the birthday-reminders-disabled thing in the description, since people think "(currently disabled)" in the header means they've disabled it, not we've disabled it