Todo

added messagesniffer to rename list
added bounce to rename list
deprecate the mail_from and rcpt_to.blocklist plugins (replaced by *.access)

Steve saith in my prior pull request:

`I've been cogitating about this over the past few days.

MessageSniffer can reject at connect and at data_post so this isn't appropriate. If we were to change this to data.messagesniffer, then we should rename your bounce plugin mail_from.bounce or rcpt_to.bounce or data.bounce.`

Agreed, bounce should be renamed too. It matches the pattern of the SPF plugin, and URIBL plugin. Just because they do stuff on other hooks doesn't mean they don't have a very strong association with a particular phase in the SMTP connection.