The `anyhow` crate interoperates with the `std::error::Error` trait
rather than a custom `Fail` trait, and this is the general trend of
error handling in Rust as well.
Note that this is mostly mechanical (sed) and intended to get the test
suite passing. As usual there's still more idiomatic cleanup that can
happen, but that's left to later commits.
This commit removes Cargo's dependency on `winapi` 0.2 which takes an
excessively long time to build, slowing down Windows builds. The
`winapi` 0.2 crate was pulled in via a dependency chain that looked
like:
cargo
\- crates-io
\- http
\- bytes
\- iovec
\- winapi 0.2
The fix implemented here was to remove the `http` crate dependency from
`crates-io` which is only used for rendering status codes, but it's easy
enough to inline that function locally.
