Vendor dependencies

Let's see how I like this workflow.

vendor/redox_users/Cargo.toml

@@ -0,0 +1,44 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+name = "redox_users"
+version = "0.4.3"
+authors = ["Jose Narvaez <goyox86@gmail.com>", "Wesley Hershberger <mggmugginsmc@gmail.com>"]
+description = "A Rust library to access Redox users and groups functionality"
+documentation = "https://docs.rs/redox_users"
+readme = "README.md"
+keywords = ["redox", "auth"]
+license = "MIT"
+repository = "https://gitlab.redox-os.org/redox-os/users"
+[dependencies.getrandom]
+version = "0.2"
+features = ["std"]
+
+[dependencies.redox_syscall]
+version = "0.2.11"
+
+[dependencies.rust-argon2]
+version = "0.8"
+optional = true
+
+[dependencies.thiserror]
+version = "1.0"
+
+[dependencies.zeroize]
+version = "1.4"
+features = ["zeroize_derive"]
+optional = true
+
+[features]
+auth = ["rust-argon2", "zeroize"]
+default = ["auth"]