This makes it possible to point users back at the instructions they
followed originally in the event that their Zephyr mirroring bot has
died.
(imported from commit 24ab2dc0df3dc88f8155d58761a89fe44c111fd9)
Here we introduce a new manage.py command, activate_mit, which takes a
number of usernames and sends out emails to the users with instructions on
how to activate their accounts.
(imported from commit f14401b55f915698e83ff27b86434f53e64685f3)