Update README's description of OpenSSL requirement.

README.md

@@ -49,7 +49,7 @@ int main()
 * This project supports `Linux`, `macOS`, `Windows`, `Android` and other operating systems.
   * `Windows` version is currently released as an independent [branch](https://github.com/sogou/workflow/tree/windows), using `iocp` to implement asynchronous networking. All user interfaces are consistent with the `Linux` version.
 * Supports all CPU platforms, including 32 or 64-bit `x86` processors, big-endian or little-endian `arm` processors, `loongson` processors.
-* Master branch requires SSL and `OpenSSL 1.1` or above is recommended. Fully compatible with BoringSSL. If you don't like SSL, you may checkout the [nossl](https://github.com/sogou/workflow/tree/nossl) branch.
+* Master branch requires `OpenSSL 1.1` or above, and BoringSSL is fully compatible. If you don't like SSL, you may checkout the [nossl](https://github.com/sogou/workflow/tree/nossl) branch.
 * Uses the `C++11` standard and therefore, it should be compiled with a compiler which supports `C++11`. Does not rely on `boost` or `asio`.
 * No other dependencies. However, if you need `Kafka` protocol, some compression libraries should be installed, including `lz4`, `zstd` and `snappy`.
 

README_cn.md

@@ -44,7 +44,7 @@ int main()
 * 项目支持``Linux``，``macOS``，``Windows``，``Android``等操作系统。
   *  ``Windows``版以[windows](https://github.com/sogou/workflow/tree/windows)分支发布，使用``iocp``实现异步网络。用户接口与``Linux``版一致。
 * 支持所有CPU平台，包括32或64位``x86``处理器，大端或小端``arm``处理器，国产``loongson``龙芯处理器实测支持。
-* 需要依赖于``OpenSSL``，推荐``OpenSSL 1.1``及以上版本。
+* 需要依赖于``OpenSSL 1.1``或以上版本，也兼容BoringSSL。
   * 不喜欢SSL的用户可以使用[nossl](https://github.com/sogou/workflow/tree/nossl)分支，代码更简洁。
 * 项目使用了``C++11``标准，需要用支持``C++11``的编译器编译。但不依赖``boost``或``asio``。
 * 项目无其它依赖。如需使用``kafka``协议，需自行安装``lz4``，``zstd``和``snappy``几个压缩库。