[framework] Fake Gina

[Nicolas RUFF]

> Just a quick comment.  IIRC, using a fake GINA will prevent fast user
> switching.  If you're going for covertness, it's probably not the way to
> go :)

Fast User Switching does not work when joined to a domain. This is the
most common scenario for pentesters, I think.

One possible solution to avoid a reboot would be to hook exported
function of MSGINA.DLL (or whatever GINA in place) that are called back
on cleartext password manipulation (log in, unlock workstation).

BTW, having a DLL hooking framework in Metasploit would allow other
great things (such as SSL sniffing :) Some of the Meterpreter code could
be reused maybe.

My .02,
- Nicolas RUFF