'sessionError' 事件
error<Error>session<ServerHttp2Session>
当与 Http2SecureServer 关联的 Http2Session 对象触发 'error' 事件时,则将触发 'sessionError' 事件。
error<Error>session<ServerHttp2Session>
The 'sessionError' event is emitted when an 'error' event is emitted by
an Http2Session object associated with the Http2SecureServer.