Description of security groups configuration options

Configuration option = Default value	Description
[SECURITYGROUP]
defer_apply = True	(BoolOpt) Enable defer_apply on security bridge.
enable_ipset = True	(BoolOpt) Use ipset to speed-up the iptables based security groups.
enable_security_group = True	(BoolOpt) Controls whether the neutron security group API is enabled in the server. It should be false when using no security groups or using the nova security group API.
firewall_driver = None	(StrOpt) Driver for security groups firewall in the L2 agent
ovsvapp_firewall_driver = networking_vsphere.drivers.ovs_firewall.OVSFirewallDriver	(StrOpt) DriverManager implementation for OVS based Firewall.
security_bridge_mapping = br-sec	(StrOpt) <security_bridge>:<phy_interface>