Support into_raw_fd for TcpStream to allow dispose but keep connection open #694
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What does this PR do?
Adds the ability to dispose of active TcpStream object but keep it open - for another executor to take over for example.
Motivation
I have a prototype server here that uses glommio:
https://github.com/utilitydelta-io/glommio-sharded-affinity-server-starter
I wanted to migrate the tcp connection to a different executor.
Checklist
[x] I have added unit tests to the code I am submitting
[x] My unit tests cover both failure and success scenarios