Add gzip support

[Altai-man]

This is now de facto required to serve a website nicely, so why not support this? Yes, an nginx proxy can do this instead, but I don't think we want to rely on solutions of others forever and ever.

[jnthn]

Agree. It's at least as important in the HTTP client too, where "stick Apache/nginx in front" is not an option.

[Zer0-Tolerance]

Hi there, I would vote for this feature as well !