FreeNAS Code

Modify WebGUI look and fix rendering bug in table header.

Make sure it is not possible to execute anything if session has been timed out. Because of that 'auth.inc' MUST be included at FIRST in EACH php script.

Improve webgui code to allow more CSS customization.

Remove useless html <img> width/height parameter.

Modify WebGUI tabs look.

Added 'System: Advanced: sysctl.conf' WebGUI to add additional MIB's to /etc/sysctl.conf. Thanks to Nelson Silva (nsilva@...).

Add 'System: Advanced: rc.conf' WebGUI to add additional options to rc.conf. This is useful to overwrite options used by various generic startup scripts.

Refactor email configuration.

- Remove CSS style from tabs HTML code
- Mass copyright update

Fix the title's to follow the same rule.