Drop ServerHttpProtocol.keep_alive_timeout attire and old keep-alive related ctor params

[fafhrd91]

Drop ServerHttpProtocol.keep_alive_timeout attire and old keep-alive related ctor params

[lock]

This thread has been automatically locked since there has not been
any recent activity after it was closed. Please open a new issue for
related bugs.

If you feel like there's important points made in this discussion,
please include those exceprts into that new issue.