Log Message:
openldap: updated to 2.4.52

OpenLDAP 2.4.52 (2020/08/28)
	Added libldap LDAP_OPT_X_TLS_REQUIRE_SAN option
	Added libldap OpenSSL support for multiple EECDH curves
	Added slapd OpenSSL support for multiple EECDH curves
	Fixed librewrite malloc/free corruption
	Fixed libldap hang when using UDP and server down
	Fixed slapd syncrepl rare deadlock due to network issues
	Fixed slapd syncrepl regression that could trigger an assert
	Fixed slapd-mdb index error with collapsed range