Logs:
* User enrolling in OATHAuth
* User un-enrolling in OATHAuth
* Scratch token used
* 2FA disabled via a maintenance script
* 2FA disabled via Special:DisableOATHForUser
* Logged in using OTP
* User attempted to enable 2FA using a scratch token
* User attempted to enable 2FA using an invalid OTP
Bug: T151010
Change-Id: Ie6ee610a11814616d34c3d9f5467a563f0db2df3