Mandatory host header in http 1.1

Add .gitattributes, exclude tests from archive

Change phrase to 413 status code

Use Null Coalesce Operator

Use constant in async tcp connection transports

Use constant for built in transports

Use constant for error types

Use constant in phrases for codes

https://en.wikipedia.org/wiki/List_of_HTTP_status_codes

修复PHP Warning: Undefined array key警告

For #778

Worker code optimization

Allow to change lifetime without application reload

添加对 Connection 的序列化操作

Update Worker.php

fixes for getting class name

when we try to extend the `Worker` class, we cannot extend all the mechanisms of the class becau...

防止在serverless部署中，因为runtime需要迁移到/tmp下时(serverless全局仅读，仅/tmp可写)， runtime/logs 不存在时候的报错
touch(): ...