slaprunner: secure access to cloud9 with nginx

Nginx is set in front of cloud9 running in local with https to secure its access
slaprunner: add .htpasswd file to resilient part of runner
slaprunner: launcher for nginx with ssl certificate, parameters for default sr, bug fix
slaprunner: fix hardcoded path in nginx_conf
slaprunner: fix https for cloud9

- Add patch to cloud9 to fix path used by polling request
- Add a node js simple http proxy to globaly access cloud9
- Add a frontend request to provide ipv4 access to cloud9
- Update nginx