package/openldap: update to 2.5.18

See here for a Changelog:
https://openldap.org/software/release/changes_lts.html

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 61ad5516485a1b4518c4997c9a146a5faa96e6d2)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/openldap/openldap.hash

@@ -1,5 +1,5 @@
 # Verified by locally checking against the SHA3-512 hash available in
-# https://www.openldap.org/software/download/OpenLDAP/openldap-release/openldap-2.5.16.sha3-512
+# https://www.openldap.org/software/download/OpenLDAP/openldap-release/openldap-2.5.18.sha3-512
 # Locally computed
-sha256  546ba591822e8bb0e467d40c4d4a30f89d937c3a507fe83a578f582f6a211327  openldap-2.5.16.tgz
+sha256  2670ae43d8d99dd6b1ba182101d982350d613d09c098eb1607ea6b36e6b51d3e  openldap-2.5.18.tgz
 sha256  310fe25c858a9515fc8c8d7d1f24a67c9496f84a91e0a0e41ea9975b1371e569  LICENSE

package/openldap/openldap.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-OPENLDAP_VERSION = 2.5.16
+OPENLDAP_VERSION = 2.5.18
 OPENLDAP_SOURCE = openldap-$(OPENLDAP_VERSION).tgz
 OPENLDAP_SITE = https://www.openldap.org/software/download/OpenLDAP/openldap-release
 OPENLDAP_LICENSE = OpenLDAP Public License