pfSense

Backend support for bridges.

Rewrite portions of the user manager to ensure data is properly synced to
the system password and group databases. This is to provide better support
for centralized user management when local account administration is
preferred.

I also took this opportunity to do some housekeeping. A lot of funtions...

Log carp state changes to system logging. Why we haven't done this prior
is a oversight on my part.

fix typo

Propperly handle reconfiguration of all interfaces for VLAN/GRE/GIF.
VLAN's where wrongly removed by me previously.

Return null return value so we know when we did not find any match.

DRY up the code a tad, download_file_with_progress_bar isn't related to
packages only anymore, move into pfsense-utils and allow for multiple
file write functions (firmware upgrades use a different one than our
standard)

Move Inline CSS and JS functions to guiconfig.inc.

Check if cuntions exists bvefore defining them to preven errors with some scripts mostly from console.

Add the new knobs to the parser