Sudo (-u) should also support a password

[randyoyarzabal]

Currently, Reach only supports passwordless sudo. The sudo (-u) option should allow for a password. An idea would be to leave -u, and create a new option called --sudo=$CT=<cipher text> that acts the same as -u except, it will send a password in cipher text. It should also ensure that the password is not echoed to the screen or logs.