When email is configured and a REGISTER includes an address, the account
starts unverified and a confirmation code is emailed. CONFIRM <code>
verifies it (a federated AccountVerified event); INFO shows an unconfirmed
email until then. Emailed codes now carry a purpose (reset vs confirm).
INFO shows an account's registration date and (to its owner) email; ALIST
lists the channels an account founds or has access on. The UTC time
formatter moves to the db module so both services share it.
