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Netty 4.1.31.Final 发布，经典开源 Java 网络服务框架

Netty 4.1.31.Final 发布了，该版本包含错误修复，以及一些重要的改进和性能提升。除此之外，还提供了对 TLSv1.3 的支持（通过 Java 11 或 netty-tcnative / netty-tcnative-boringssl-static 实现）。

重要的变更内容：

Fix leak and corruption bugs in CompositeByteBuf ( #8438 )
Optimize AbstractByteBuf.getCharSequence() in US_ASCII case ( #8392 )
(fix) incorrect reachability assumption in ResourceLeakDetector ( #8410 )
Correctly detect if KeyManagerFactory is supported by OpenSSL even when sun.security.x509.* can not be accessed and bouncycastle is not on the classpath. ( #8415 )
Reduce overhead by ByteBufUtil.decodeString(...) which is used by AbstractByteBuf.toString(...) and AbstractByteBuf.getCharSequence(...) ( #8388 )
CompositeByteBuf.decompose(...) does not correctly slice content ( #8403 )
Allow to use TLSv1.3 with netty-tcnative withe java versions prior to 11 ( #8394 )
Add support for TLSv1.3 #8293 )
Add support for boringssl and TLSv1.3 ( #8412 )
Ensure OpenSslEngine will not try to call SSL_free multiple times even when constructor throws #8399 )
Add full JdkSslContext public constructor #8389 )
Prevent NPE when attempting to set client key material with no alias #8378 )
epoll_wait produces an EINVAL error since 4.1.30 #8350 )
Correctly parse /etc/resolv.conf when contain multiple entries for searchdomain #8351 )
Correctly decrement pending bytes when submitting AbstractWriteTask fails #8349 )
Fix SelectableChannel support in NioEventLoop #8344 )
Added option to do busy-wait on epoll #8267 )
Ensure X509KeyManager methods are called on the correct time when using server-side and support more methods of ExtendedSSLSession #8283 )
Do the same extended checks as the JDK when a X509TrustManager is used with the OpenSSL provider #8307 )