main/openldap: upgrade to 2.6.0
https://www.openldap.org/software/release/announce.html
https://www.openldap.org/software/release/changes.html
no soname changes! (in 2.5.x it was)
Openssl 3.0 issue https://bugs.openldap.org/show_bug.cgi?id=9436
Edited by Jakub Jirutka