gh-100795: Don't call freeaddrinfo on failure. (GH-101252)

When getaddrinfo returns an error, the output pointer is in an unknown state
Don't call freeaddrinfo on it.  See the issue for discussion and details with
links to reasoning.  _Most_ libc getaddrinfo implementations never modify the
output pointer unless they are returning success.

(cherry picked from commit b724ac2fe7fbb5a7a33d639cad8e748f17b325e0)

Co-authored-by: Gregory P. Smith <greg@krypto.org>
Co-authored-by: Sergey G. Brester <github@sebres.de>
Co-authored-by: Oleg Iarygin <dralife@yandex.ru>