smtp-relay: Rewrite dustin@hatch.name

Sometimes, the mail server for *hatch.name* is extremely slow.  While
there isn't much I can do about it for external senders, I can at least
ensure that email messages sent by internal services like Authelia are
always delivered quickly by rewriting the recipient address to my
actualy email address, bypassing the *hatch.name* exchange entirely.

group_vars/smtp-relay.yml

@@ -6,3 +6,5 @@ smtp:
   username: '{{ smtp_username }}'
   password: '{{ smtp_password }}'
   security: starttls
+postfix_recipient_canonical_map:
+  dustin@hatch.name: gyrfalcon@ebonfire.com