added binary-safe (hopefully) pipe for upcoming dylib extension support

orchid-base/src/reqnot.rs

@@ -281,6 +281,8 @@ impl CommCtx {
 	pub fn client(&self) -> Rc<dyn Client> { self.client.clone() as Rc<dyn Client> }
 }
 
+/// This function will exit only when one of the callbacks calls
+/// [CommCtx::quit].
 pub async fn io_comm<Req: 'static, Not: 'static>(
 	o: Rc<Mutex<Pin<Box<dyn AsyncWrite>>>>,
 	i: Mutex<Pin<Box<dyn AsyncRead>>>,