networkmanager: password information disclosure

NetworkManager-0.8.999-3.git20110526 inadvertently included a piece of debugging code that may have logged some VPN passwords to syslog. That version was available as an update for five (5) days before the fixed version was available. Users are advised to inspect log files in /var/log (and any backups) for VPN passwords and remove any that are found. The string "destroy_one_secret" may be used to identify files to be cleaned, such as by using the following command: 'grep -riI "destroy_one_secret" /var/log'.