pgsql: Fix memory leak in libpq when using sslmode=verify-full

Fix memory leak in libpq when using sslmode=verify-full

Checking if Subject Alternative Names (SANs) from a certificate match
with the hostname connected to leaked memory after each lookup done.

This is broken since acd08d7 that added support for SANs in SSL
certificates, so backpatch down to 9.5.

Author: Roman Peshkurov
Reviewed-by: Hamid Akhtar, Michael Paquier, David Steele
Discussion: https://postgr.es/m/CALLDf-pZ-E3mjxd5=bnHsDu9zHEOnpgPgdnO84E2RuwMCjjyPw@mail.gmail.com
Backpatch-through: 9.5

Branch
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REL_10_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/1bb0293d844538ee39b14a7965a9ea7e10dcae93

Modified Files
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src/interfaces/libpq/fe-secure-openssl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)