fixes MODULES-796
Cheat by adding quotes around policy ipsec and all following options
belonging to ipsec. Otherwise the line cannot be parsed correctly.
The list of options is taken from [1] and the output ordering was
experimentally verified with iptables-v1.4.21 on Ubuntu 14.04.

[1] http://ipset.netfilter.org/iptables-extensions.man.html
Add tests and fix docs/whitespace
Merge pull request #363 from hunner/fix_policy_ipsec_options

(MODULES-796) Fix policy ipsec options