pfSense

Also include /127 for IPv6, it works fine. Ticket #3657

Allow for configuring /31 masks on interfaces.php. The rest of the code was updated accordingly some time ago, and an employee with Cox Communications has confirmed this allows things to work on their circuits deployed with /31s. Ticket #4190

fix up text

Provide an advanced setting to be able to disable Unity Plugin(Cisco extensions)

split is deprecated move to explode

split is deprecated move to explode

split is deprecated move to explode

fix text

fix spelling of compression

Fixes #4182 by properly managing IPcomp on ipsec tunnels.
Also retires IPsec force reloading advanced sysctl since its useless nowdays with strongswan and remove its call on rc.newipsecdns.