Konstantin Belousov 587e285e97 Silently handle freeaddrinfo(NULL) for compatibility with code which
works on other OSes.  Also avoid unnecessary NULL check, free(NULL) is
valid.

Reviewed by:	bjk (man page), hrs, hselasky, ume
Sponsored by:	Mellanox Technologies
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D12354
2017-09-14 19:18:24 +00:00
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