use httplug(bundle)

[tolry]

http://docs.php-http.org/en/latest/integrations/symfony-bundle.html

• [ ] use httplugbundle
• [ ] upgrade to newest guzzle version
• [ ] consistent timeout settings etc.
• [ ] still set user-agent depending on domain
• [ ] user httplug also for preview download (instead of file_get_contents)
• [ ] check if plugin logs timeout failures correctly to prod.log, not only web debug toolbar