Обсуждение: pgsql: Remove configure probe for gethostbyname_r.

Remove configure probe for gethostbyname_r.

It was only used by src/port/getaddrinfo.c, removed by the previous
commit.

Discussion: https://postgr.es/m/CA%2BhUKGJFLPCtAC58EAimF6a6GPw30TU_59FUY%3DGWB_kC%3DJEmVQ%40mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/52ea29045b79a5f996e454ac6c7f3bcd64aef572

Modified Files
--------------
configure                         | 65 +++------------------------------------
configure.ac                      |  3 +-
src/include/pg_config.h.in        |  3 --
src/interfaces/libpq/fe-connect.c |  2 +-
src/tools/msvc/Solution.pm        |  1 -
5 files changed, 6 insertions(+), 68 deletions(-)