secrecy 0.6.0

Wrapper types and traits for secret management which help ensure they aren't accidentally copied, logged, or otherwise exposed (as much as possible), and also ensure secrets are securely wiped from memory when dropped.
Documentation
Build #205172 2019-12-12T18:22:55.407121+00:00
# rustc version
rustc 1.41.0-nightly (27d6f55f4 2019-12-11)# docs.rs version
docsrs 0.6.0 (97a6f01 2019-12-10)# build log
[INFO] running `"docker" "create" "-v" "/home/cratesfyi/workspace/builds/secrecy-0.6.0/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/secrecy-0.6.0/source:/opt/rustwide/workdir:ro,Z" "-v" "/home/cratesfyi/workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/home/cratesfyi/workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1001" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=-Z unstable-options --resource-suffix -20191211-1.41.0-nightly-27d6f55f4 --static-root-path / --extern-html-root-url zeroize=https://docs.rs/zeroize/1.1.0" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "3221225472" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "doc" "--lib" "--no-deps" "--all-features"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b2505f5f35427784d89851b327b8fb8b4d02eaf69cffb95ffa23d941068b914c
[INFO] running `"docker" "start" "-a" "b2505f5f35427784d89851b327b8fb8b4d02eaf69cffb95ffa23d941068b914c"`
[INFO] [stderr]    Compiling serde v1.0.103
[INFO] [stderr]     Checking bytes v0.5.2
[INFO] [stderr]     Checking zeroize v1.1.0
[INFO] [stderr]  Documenting secrecy v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.90s
[INFO] running `"docker" "inspect" "b2505f5f35427784d89851b327b8fb8b4d02eaf69cffb95ffa23d941068b914c"`
[INFO] running `"docker" "rm" "-f" "b2505f5f35427784d89851b327b8fb8b4d02eaf69cffb95ffa23d941068b914c"`
[INFO] [stdout] b2505f5f35427784d89851b327b8fb8b4d02eaf69cffb95ffa23d941068b914c