Is it possible to add securityManager in the config?

[Marcio Cunha]

I need to use securityManager to pin a ssl certificate.
Can you add this method in the config settings??
if (_.has(config, 'securityManager')) {
http.setSecurityManager(config.securityManager);
}

[Jason Kneen]

want to try a PR for this?

[Hans Knöchel]

Handled in #65