Handle KBI (#821)

Author: abhinavsingh

proxy/core/acceptor/threadless.py

@@ -313,6 +313,8 @@ async def _run_forever(self) -> None:
                         break
                     tick = 0
                 tick += 1
+        except KeyboardInterrupt:
+            pass
         finally:
             if self.loop:
                 self.loop.stop()