VNC plugin error on reading and parsing registry key

[Th3l5D]

The VNC plugin in software/sysadmin/vnc.py does not handle properly the read of a registry key.

There is two issues:

• After getting the key from registry, the variable is bytes, but on line 107, you triy to rstrip() some string, causing an error.
• On the reverse_vncpassword method, you try to unhex/hex the same variable, but as it's bytes and not a string hex representation, it fails.

[Th3l5D]

Will send a PR with a fix (tested only on thightVNC on a single asset) in a second if I understand how it works :D

Edit : PR sent. Please note that I fixed the issue and removed the (now useless) unhex method. I did NOT rewrote any part of the code to be more readable.

[login-securite]

Thanks ;-)