BUG/MEDIUM: connections: Don't forget to detach the connection from the SI.
When we're deferring the mux choice until the ALPN is negociated, we
attach the connection to the stream_interface until it's done, so that we
can destroy it if something goes wrong and the stream is destroy.
Before calling si_attach_cs() to attach the conn_stream once we have it,
call si_detach_endpoint(), or is_attach_cs() would destroy the connection.
diff --git a/src/backend.c b/src/backend.c
index 29a21da..7a2168a 100644
--- a/src/backend.c
+++ b/src/backend.c
@@ -1056,6 +1056,7 @@
goto fail;
if (conn->flags & CO_FL_ERROR)
goto fail;
+ si_detach_endpoint(&s->si[1]);
cs = si_alloc_cs(&s->si[1], conn);
if (!cs)
goto fail;