[strongSwan] roadwarrior ike/esp SA are not dropped after lifetime expiration

[Marco Berizzi]

> Yes indeed dpd should do the trick. 

unfortunately windows 7 and windows 10 doesn't support dpd. Charon is logging these messages:

DPD not supported by peer, disabled 

So dpd was not an option.

inactivity= is going to kill only the child sa. As pointed by Noel setting charon.inactivity_close_ike is going to kill also the ike sa. But I didn't want to change a system wide settings.

So I have opted for setting:

rekey=yes
keyingtries=1