The command to set the vpn interface is changed in the rolling release
which is not modified in many configuration examples, corrected syntax
in all pages where it is mentioned
Removed the note from the firewall page as nat grouping is not added yet
Added the information about new option 'none' in the site-to-site ipsec vpn
page
There were minimal grammatical and spelling mistakes in the files which I
corrected as documentation proof reading.
Also added information about few ipsec vpn parameters.