avoid segmentation fault if failed to allocate sockaddr str space and do not change server address until initialization be completed with success
avoid segmentation fault if failed to allocate sockaddr str space and do not change server address until initialization be completed with success

GUI/nginx-upstream-dynamic-servers,wandenberg/nginx-upstream-dynamic-servers,wandenberg/nginx-upstream-dynamic-servers,GUI/nginx-upstream-dyanmic-servers,GUI/nginx-upstream-dynamic-servers,GUI/nginx-upstream-dyanmic-servers