Dirk Mueller ebe28a7b8d Remove outdated instructions about horizon integration
The enable_firewall and enable_vpn settings in horizon
have been dropped since pike, see

https://docs.openstack.org/releasenotes/horizon/pike.html

Change-Id: Id46e3e691b170d2240845b7adbbd58ead2db6424
2019-03-26 20:24:35 +01:00
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