stable sorting out sorting here is stable by comparing service_order.
* sysdeps/posix/getaddrinfo.c (struct sort_result): Add
service_order.
- (rfc3484_sort): Make sure that even of qsort doesn't support
- stable sorting it is stable by comparing service_order.
+ (rfc3484_sort): Make sure that even if qsort doesn't support
+ stable sorting out sorting here is stable by comparing service_order.
(getaddrinfo): Initialize service_order.
* posix/tst-rfc3484.c (do_test): Adjust for addition of
service_order field to sorting structure.