Install libstrongswan-extra-plugins by default

[vampywiz17]

Hello there

Some days ago i try to create a IPsec VPN connection. Every time i get error that VPN is not established. I google a lot but not found any sollution. but now, finally i found the problem!

It need to install this package:

libstrongswan-extra-plugins

and after it work like a charm!

My idea is that would be good that install this package default, because if you do this, ipsec work out of the box.

[BLumia]

cc @Zeno-sole