Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# Rand
+
+[![Build Status](https://travis-ci.org/rust-random/rand.svg?branch=master)](https://travis-ci.org/rust-random/rand)
+[![Build Status](https://ci.appveyor.com/api/projects/status/github/rust-random/rand?svg=true)](https://ci.appveyor.com/project/rust-random/rand)
+[![Crate](https://img.shields.io/crates/v/rand.svg)](https://crates.io/crates/rand)
+[![Book](https://img.shields.io/badge/book-master-yellow.svg)](https://rust-random.github.io/book/)
+[![API](https://img.shields.io/badge/api-master-yellow.svg)](https://rust-random.github.io/rand)
+[![API](https://docs.rs/rand/badge.svg)](https://docs.rs/rand)
+[![Minimum rustc version](https://img.shields.io/badge/rustc-1.32+-lightgray.svg)](https://github.com/rust-random/rand#rust-version-requirements)
+
+A Rust library for random number generation.
+
+Rand provides utilities to generate random numbers, to convert them to useful
+types and distributions, and some randomness-related algorithms.
+
+The core random number generation traits of Rand live in the [rand_core](
+https://crates.io/crates/rand_core) crate but are also exposed here; RNG
+implementations should prefer to use `rand_core` while most other users should
+depend on `rand`.
+
+Documentation:
+-   [The Rust Rand Book](https://rust-random.github.io/book)
+-   [API reference (master)](https://rust-random.github.io/rand)
+-   [API reference (docs.rs)](https://docs.rs/rand)
+
+
+## Usage
+
+Add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+rand = "0.7"
+```
+
+To get started using Rand, see [The Book](https://rust-random.github.io/book).
+
+
+## Versions
+
+Rand libs have inter-dependencies and make use of the
+[semver trick](https://github.com/dtolnay/semver-trick/) in order to make traits
+compatible across crate versions. (This is especially important for `RngCore`
+and `SeedableRng`.) A few crate releases are thus compatibility shims,
+depending on the *next* lib version (e.g. `rand_core` versions `0.2.2` and
+`0.3.1`). This means, for example, that `rand_core_0_4_0::SeedableRng` and
+`rand_core_0_3_0::SeedableRng` are distinct, incompatible traits, which can
+cause build errors. Usually, running `cargo update` is enough to fix any issues.
+
+The Rand lib is not yet stable, however we are careful to limit breaking changes
+and warn via deprecation wherever possible. Patch versions never introduce
+breaking changes. The following minor versions are supported:
+
+-   Version 0.7 was released in June 2019, moving most non-uniform distributions
+    to an external crate, moving `from_entropy` to `SeedableRng`, and many small
+    changes and fixes.
+-   Version 0.6 was released in November 2018, redesigning the `seq` module,
+    moving most PRNGs to external crates, and many small changes.
+-   Version 0.5 was released in May 2018, as a major reorganisation
+    (introducing `RngCore` and `rand_core`, and deprecating `Rand` and the
+    previous distribution traits).
+-   Version 0.4 was released in December 2017, but contained almost no breaking
+    changes from the 0.3 series.
+
+A detailed [changelog](CHANGELOG.md) is available.
+
+When upgrading to the next minor series (especially 0.4 → 0.5), we recommend
+reading the [Upgrade Guide](https://rust-random.github.io/book/update.html).
+
+### Yanked versions
+
+Some versions of Rand crates have been yanked ("unreleased"). Where this occurs,
+the crate's CHANGELOG *should* be updated with a rationale, and a search on the
+issue tracker with the keyword `yank` *should* uncover the motivation.
+
+### Rust version requirements
+
+Since version 0.7, Rand requires **Rustc version 1.32 or greater**.
+Rand 0.5 requires Rustc 1.22 or greater while versions
+0.4 and 0.3 (since approx. June 2017) require Rustc version 1.15 or
+greater. Subsets of the Rand code may work with older Rust versions, but this
+is not supported.
+
+Travis CI always has a build with a pinned version of Rustc matching the oldest
+supported Rust release. The current policy is that this can be updated in any
+Rand release if required, but the change must be noted in the changelog.
+
+## Crate Features
+
+Rand is built with these features enabled by default:
+
+-   `std` enables functionality dependent on the `std` lib
+-   `alloc` (implied by `std`) enables functionality requiring an allocator (when using this feature in `no_std`, Rand requires Rustc version 1.36 or greater)
+-   `getrandom` (implied by `std`) is an optional dependency providing the code
+    behind `rngs::OsRng`
+
+Optionally, the following dependencies can be enabled:
+
+-   `log` enables logging via the `log` crate
+-   `stdweb` implies `getrandom/stdweb` to enable
+    `getrandom` support on `wasm32-unknown-unknown`
+    (will be removed in rand 0.8; activate via `getrandom` crate instead)
+-   `wasm-bindgen` implies `getrandom/wasm-bindgen` to enable
+    `getrandom` support on `wasm32-unknown-unknown`
+    (will be removed in rand 0.8; activate via `getrandom` crate instead)
+
+Additionally, these features configure Rand:
+
+-   `small_rng` enables inclusion of the `SmallRng` PRNG
+-   `nightly` enables all experimental features
+-   `simd_support` (experimental) enables sampling of SIMD values
+    (uniformly random SIMD integers and floats)
+
+Rand supports limited functionality in `no_std` mode (enabled via
+`default-features = false`). In this case, `OsRng` and `from_entropy` are
+unavailable (unless `getrandom` is enabled), large parts of `seq` are
+unavailable (unless `alloc` is enabled), and `thread_rng` and `random` are
+unavailable.
+
+# License
+
+Rand is distributed under the terms of both the MIT license and the
+Apache License (Version 2.0).
+
+See [LICENSE-APACHE](LICENSE-APACHE) and [LICENSE-MIT](LICENSE-MIT), and
+[COPYRIGHT](COPYRIGHT) for details.