Allow custom domain with CDN and SSL setup using QUIC.Cloud

Suggestion: Allow custom domain setup using QUIC.Cloud.

Why? Firstly, I love cloudflare as a reverse proxy cdn. However, using a litespeed server and wordpress CMS QUIC.Cloud (also a reverse proxy CDN) provides a more feature rich performance offering and is easier to setup. Outside of cloudflare, QUIC.Cloud are the fastest growing CDN for wordpress users and easily the fastest for Litespeed Wordpress users. Please make it easier for for more customers of ElkQR to benefit from your custom domain feature.