Обсуждение: pgsql: Add configure probe for rl_variable_bind().

Add configure probe for rl_variable_bind().

Some exceedingly ancient readline libraries lack this function, causing
commit 3d858af07 to fail.  Per buildfarm (via Michael Paquier).

Discussion: https://postgr.es/m/E1msTLm-0007Cm-Ri@gemulon.postgresql.org

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/a7da41981021575e2359683d994eec6c9d246321

Modified Files
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configure                  | 14 +-------------
configure.ac               | 10 ++++++++--
src/bin/psql/input.c       |  2 ++
src/include/pg_config.h.in |  3 +++
src/tools/msvc/Solution.pm |  1 +
5 files changed, 15 insertions(+), 15 deletions(-)