MINOR: session: export session_expire_embryonic()
This is only to make it resolve nicely in "show tasks".
diff --git a/src/tools.c b/src/tools.c
index 8891d47..4ad6b95 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -4699,6 +4699,7 @@
{ .func = listener_accept, .name = "listener_accept" },
{ .func = poller_pipe_io_handler, .name = "poller_pipe_io_handler" },
{ .func = mworker_accept_wrapper, .name = "mworker_accept_wrapper" },
+ { .func = session_expire_embryonic, .name = "session_expire_embryonic" },
#ifdef USE_THREAD
{ .func = accept_queue_process, .name = "accept_queue_process" },
#endif