libreswan was added to Debian Sid earlier in the year and it made its way to Ubuntu 17.04.
Upstream in the GNOME Projects network-manager-libreswan GIT repository in the NEWS file, you'll notice network-manager-libreswan was renamed from network-manager-openswan at version 1.2 https://git.gnome.org/browse/network-manager-libreswan/tree/
Debian/Ubuntu used to include network-manager-openswan, so that package might be a good starting point for updating to network-manager-libreswan.
I suggest you file a Debian Request for Package (RFP) for network- manager- libreswan : /wiki.debian. org/RFP
https:/
Once the package is in Debian Sid, it will automatically make its way to Ubuntu.
Or if you are able to provide a package, an Intent to Package (ITP) : /wiki.debian. org/ITP
https:/
libreswan was added to Debian Sid earlier in the year and it made its way to Ubuntu 17.04.
Upstream in the GNOME Projects network- manager- libreswan GIT repository in the NEWS file, you'll notice network- manager- libreswan was renamed from network- manager- openswan at version 1.2 /git.gnome. org/browse/ network- manager- libreswan/ tree/
https:/
Debian/Ubuntu used to include network- manager- openswan, so that package might be a good starting point for updating to network- manager- libreswan.