Do not add OpenSSL dependencies to libpq pkg-config file if OpenSSL is
not enabled. Oversight in
beff361bc1edc24ee5f8b2073a1e5e4c92ea66eb.
Author: Fabrice Fontaine
Discussion: https://www.postgresql.org/message-id/flat/20220331163759.32665-1-fontaine.fabrice%40gmail.com
SHLIB_EXPORTS = exports.txt
+ifeq ($(with_ssl),openssl)
PKG_CONFIG_REQUIRES_PRIVATE = libssl libcrypto
+endif
all: all-lib libpq-refs-stamp