1.21.0-ls95

LinuxServer Changes:

Existing users should update: proxy.conf - Mitigate https://httpoxy.org/ vulnerabilities. Ref: https://www.nginx.com/blog/mitigating-the-httpoxy-vulnerability-with-nginx#Defeating-the-Attack-using-NGINX-and-NGINX-Plus

PIP Changes:

Updating PIP version of certbot to 1.21.0