Wiki set password as expired.

[m33p]

Can you add some documentation around setting a password as expired on the "Managing passwords" wiki
It took me a bit to figure this out since DirectoryEntry you always set the value to -1 but with linqtoldap I had to use this.

user.Set("pwdLastSet", 0);

I'm not sure if this is the best way to submit this. I'd like to contribute more to your wiki. Love this library! keep up the great work.

[nove1398]

Would love some insight on this as well