check user/group ownership on /etc/shadow

[cPanelSSP]

Updated the Permissions.pm assessor to display a warning if /etc/shadow has a user or group which is not root.

[bdraco]

Looks good, you could save a stat by doing this change

• my $uid = (stat('/etc/shadow'))[4];
• my $gid = (stat('/etc/shadow'))[5];
• my($uid,$gid) = (stat('/etc/shadow'))[4,5];

Merged