3.1.4

[#7808]: Update to OpenSSL 1.0.1r
[#7789]: Update to nginx 1.8.1
[#7734]: Show the actual client IP in rails.log instead of the upstream proxy IP
[#7732]: Fix an issue regarding IE11 file uploads when using the new dashboard
[#7730]: When cargo-mail is installed, permit incoming SMTP from the servers configured in postfix main.cf
[#7721]: Export all environment variables defined in /data/config/env to Rails environment
[#7696]: Update config and documentation to contain our new jumphost IP for maintenance access
[#7419]: Do not trigger CAPTCHA upon reloading the login page
[#7408]: Hide text ‘Click on the envelope to see its content’ when the secret message is displayed