How to log failed logins?

[Cantor, Scott]

> In V2, you can get this to happen (presumably for any authN method) if you
> set the logger for "edu.internet2.middleware.shibboleth.idp.authn" to
> DEBUG.
> 
> Look for:
> 
> successful authentication events:  "Login by '<username>' succeeded"
> 
> failed authentication events: "Login by '<username>’ failed"

That I was not aware of (I knew nothing was there on INFO). If people think we should raise that to INFO, there is one more patch coming...

In V3, they are on INFO.

-- Scott