kansei

Results 2 issues of kansei

# The Problem I found a bug in file-tail in which it occasionally fails to pick up newly added lines when the target file is rotated. When file-tail reaches EOF...

Fixes[https://github.com/apache/trafficserver/issues/8951](https://github.com/apache/trafficserver/issues/8951). It's okay call to `do_drain_request_body` if `t_state.next_action` is `SM_ACTION_INTERNAL_CACHE_NOOP`. Calling `do_drain_request_body` to process unwanted Body.

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