CLEANUP: Free old_argv on deinit
This allocation technically is always reachable and cannot leak, however other
global variables such as `oldpids` are already being freed. This is in an
attempt to get HAProxy to a state where there are zero live allocations after a
clean exit.
diff --git a/src/haproxy.c b/src/haproxy.c
index 5ae2182..663922e 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -2680,6 +2680,7 @@
free(global.node); global.node = NULL;
free(global.desc); global.desc = NULL;
free(oldpids); oldpids = NULL;
+ free(old_argv); old_argv = NULL;
free(localpeer); localpeer = NULL;
task_destroy(idle_conn_task);
idle_conn_task = NULL;