提供指定http.Server的ErrorLog功能

[Jardaliao]

What would you like to be added: 提供指定http.Server的ErrorLog功能

Why is this needed: http.Server的错误日志默认会写到标准输出，但它提供了指定自定义Logger的口子，getty似乎没有开放这个口子？

http\server.go

type Server struct {
        // ErrorLog specifies an optional logger for errors accepting
    // connections, unexpected behavior from handlers, and
    // underlying FileSystem errors.
    // If nil, logging is done via the log package's standard logger.
    ErrorLog *log.Logger
}

getty\options.go

type ServerOptions struct {
    addr string
    // tls
    sslEnabled       bool
    tlsConfigBuilder TlsConfigBuilder
    // websocket
    path       string
    cert       string
    privateKey string
    caCert     string
    // task queue
    tPool gxsync.GenericTaskPool
}

[AlexStocks]

如上图，可以对你用的 logger 封装下，然后调用  SetLogger 这个接口函数即可