Update ciphers and HTST settings to get A+ rating
Update ciphers and HTST settings to get A+ rating

The default config gets you an 'A' rating. Cipher settings are copied from [Mozilla SSL Configartion Generator](https://mozilla.github.io/server-side-tls/ssl-config-generator/?server=nginx-1.10.1&openssl=1.0.1t&hsts=yes&profile=intermediate)
pocket-playlab/nginx-proxy,deruhu/nginx-proxy,itsafire/nginx-proxy,kamermans/nginx-proxy,adi90x/rancher-active-proxy,krknopp/docker-nginx-proxy,palamccc/nginx-proxy,jwilder/nginx-proxy,kamermans/nginx-proxy,krknopp/docker-nginx-proxy,dylangmiles/nginx-proxy,jwilder/nginx-proxy,krknopp/docker-nginx-proxy,dylangmiles/nginx-proxy,thomasleveil/nginx-proxy,thomasleveil/nginx-proxy,pocket-playlab/nginx-proxy,adamsimp/nginx-proxy,adi90x/rancher-active-proxy,itsafire/nginx-proxy