To those wanting to use HTTP and/or HTTPS

[LexiBigCheese]

You'll want to comment out the assertion that causes issue #174 to have a panic, then cargo clean so cargo rebuilds std with this change.
Then, patch the ring crate to be the one I'm trying to get pulled into the main branch,
EDIT: It has been pulled!
EDIT2: Note: Point at ring's main branch.

[patch.crates-io]
ring = {git = "https://github.com/briansmith/ring"}

and ensure

[profile.dev.package.ring]
opt-level = 1
[profile.release.package.ring]
opt-level = 1

Note that patch and profile sections go in Cargo.toml, if you're using a cargo workspace, it does in the workspace's Cargo.toml
Additionally, you'll want the environment variable

export CFLAGS_armv6k_nintendo_3ds="-march=armv6k -mfloat-abi=hard -finline-limit=100000"

And now, the minreq crate will now let you do https.
Having a timeout may be that which causes the ureq crate to fail, I've been told to look into yielding when listening on an mpsc::Receiver, but I'm not that great at modifying std, so instead I just modified and patched ehttp to use minreq on cfg(target_os = "horizon")