Now we have separate peer draining logic, we can simply use it when
connectd tells us to release the peer, without waiting. (We could
simply free the peer, but that's a bit rude, as messages can get
lost).
This removes various complex flags and logic we had before.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Fixed: `connectd`: various crashes and issues fixed by simplification and rewrite.
8678c5efb3