pfSense

Set this to /8 instead since that's how it's done in stock FreeBSD 10.1. Ticket #3941

Setting an interface's IP to 0.0.0.0 with mask 0.0.0.0 overwrites the
default route with that interface's link route. Later in dhclient, that
gets deleted and leaves the system with no default route. Using a /32 mask
here works in every scenario I can find, and stops the default route...

Disable delete_old_states in dhclient-script. rc.newwanip handles this correctly in 2.2, and this killed states in multiple circumstances where that isn't necessary nor desirable.

Avoid reseting firewall hostname by WAN DHCP. It should fix #3746

Fix #3700 and other syntax issues:

- Remove G parameter from pfctl since it doesn't exist anymore
Initialize $old_router
- Fix sh syntax on variable assign, it couldn't have space before =
- Simplify logic
- Avoid flush states twice, if it was done on IP change, don't do it...

Remove unused ppp-script

Whitespace fixes

Set the interface as first here to properly be able to identify it after in php code. Ticket #2495

Tune up a bit dhclient-script and call the kill state command only once its enough

Ticket #1629 Another round of fixes related to state clearing