Add bad user agents

A black list of prohibited user agents is blocked when the "Block Bad User Agents" module in the "Firewall" section is enabled.

It is possible to add agents to this list by using a hook as follows :

add_filter('secupress.bad_user_agents.list', 'secupress_support_add_user_agents');
function secupress_support_add_user_agents($default_user_agents ) {
    return $default_user_agents . ', user_agent_1, user_agent_2';
}