evaluate titus

[jacksingleton]

https://www.opsmate.com/titus/

titus is a tool from Andrew Ayer (https://www.agwa.name/about/) that handles TLS termination and then proxies to (in our case) nginx.

this would protect from vulnerabilities in openssl because 1) the tls implementation is separate from our webserver and 2) titus does some jailing and isolation of its own