The primary targets here are openssl and openssl-sys crates 0.9,
bringing support for OpenSSL 1.1.0. This requires updating the curl
and git2 related dependencies as well.
A small change is required in cargo itself for the new Hasher API.
Results from the hasher are simply unwrapped for now, matching the
Windows behavior that already panics on error.
If a lock file is generated and some equivalent of `cargo fetch` is run then
Cargo shouldn't ever touch the network or modify `Cargo.lock` until any
`Cargo.toml` later changes, but this often wants to be asserted in some build
environments where it's a programmer error if Cargo attempts to access the
network.
The `--locked` flag added here will assert that `Cargo.lock` does not need to
change to proceed. That is, if `Cargo.lock` would be modified (as it
automatically is by default) this is turned into a hard error instead.
This `--frozen` will not only assert that `Cargo.lock` doesn't change (the same
behavior as `--locked`), but it will also will manually prevent Cargo from
touching the network by ensuring that all network requests return an error.
These flags can be used in environments where it is *expected* that no network
access happens (or no lockfile changes happen) because it has been pre-arranged
for Cargo to not happen. Examples of this include:
* CI for projects want to pass `--locked` to ensure that `Cargo.lock` is up to
date before changes are checked in.
* Environments with vendored dependencies want to pass `--frozen` as touching
the network indicates a programmer error that something wasn't vendored
correctly.
A crucial property of these two flags is that **they do not change the behavior
of Cargo**. They are simply assertions at a few locations in Cargo to ensure
that actions expected to not happen indeed don't happen. Some documentation has
also been added to this effect.
Closes#2111
Compiling everything in one binary was getting annoying as it just took forever
to build, instead shard it all up so we can build just particular test suites at
a time.
