Fix #4458, more informative errors for ms04_011

[wchen-r7]

Fix #4458

This patch allows the MS04-11 exploit to be more informative about which part of the attack has failed.

Testing

To be honest, the exploit is really old and I don't even have a box for testing anymore. But what you can do to make sure you exercise all the exploit is:

• Set up a fake server: ruby -run -e httpd . -p 8181
• Start msfconsole
• use exploit/windows/ssl/ms04_011_pct
• set rport 8181
• set rhost [IP]
• run
• In the Ruby server, you should see some malicious data from the exploit. The malicious data portion is sent pretty much at the end of the exploit method, so this is a good indication you've exercised the code.

[wvu]

w00t!