http_proxy / https_proxy not working in anyzig v2025_10_15

[weim-o]

When using anyzig v2025_10_15, setting http_proxy and https_proxy in the terminal has no effect — all fetch requests fail with 400 Bad Request.

It seems the Zig version bundled with anyzig does not properly implement proxy support in std.http.Client.initDefaultProxies(). The function only reads environment variables but does not actually use them to route requests through the proxy.

Please consider upgrading the Zig version used to build anyzig to one that correctly supports HTTP/HTTPS proxies.