Minor fixes for getaddrinfo_a usage
* src/process.c (Fdelete_process): Check gai_cancel return value. That way, there’s no need to invoke gai_error. Check gai_suspend return value. (Fmake_network_process): Don’t assume gai_strerror returns a UTF-8 string. Simplify call to connect_network_socket. (check_for_dns): Avoid unnecessary initialization of local.
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