[Swan] leftvti= support added

[Paul Wouters]

On Sat, 24 Sep 2016, Reuben Farrelly wrote:

> The other fix which will help things quite a bit more (currently this is 
> something I have to hack manually) is when the leftvti= and rightvti= options 
> are committed and part of the configuration.  This seems to be the missing 
> piece of the puzzle.  How far away are these options from being committed to 
> git -master ?

I just committed that to master.

https://github.com/libreswan/libreswan/commit/34173fdb002bf3a120be429e49e5822c7975fde1

Paul