pfSense

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

Use the better -Fs modifies to pf to kill the states by interface. Also kill both sides on an interface when -k needs to be used

pfctl -b is gone just use std tools of pfctl

The ISC client was far worse then the WIDE client was, back to plan A
Revert "Merge changes required for using the ISC dhclient in pfSense with prefix delegation. This should hopefully be a bit more reliable in the long run."

This reverts commit 651018775c78e38045966825b920b641a0302b43....

Merge changes required for using the ISC dhclient in pfSense with prefix delegation. This should hopefully be a bit more reliable in the long run.
The dhclient6-script could be merged with dhclient-script in the future.
Still need to cleanup old adresses and prefixes, as well as LAN prefixes when a old prefix dissapears. This needs some thought and clue to strap together.

Some more state killing refinements.

Remove states before removing the old address, or the file will be gone and the code to kill the states won't ever run.

Try to remove old states when a DHCP IP changes, might be related to ticket #1629 and also "unable to allocate llinfo" messages from states through an old gateway.

Actaully put the route adding under the conditional logic checking. Ticket #1408.