[Samba] I need to log user logon and logoff

[Denis Morejon]

I need to log to a separated file just user/computer logon and logoff.

I would like not to use log level > 2 to do this.

I have tried using vfs_full_audit but it works well into shares 
definitions.

I don't care if the user access a shared directory, I just need to 
record user login and logoff.

Thanks