This bug was initially created as a copy of Bug #2115465

I am copying this bug because: 

2.6 version of openldap libs in RHEL9.1 doesn't export symbols related to LDAP_CONNECTIONLESS feature (`ldap_is_ldapc_url()` in particularl, but other as well).

The reason - https://bugs.openldap.org/show_bug.cgi?id=9739#c3 :
```
Since the symbol in question is part of an unsupported feature, only built when the unsupported LDAP_CONNECTIONLESS flag is defined, we will not be adding it to the officially released library map files. If you want to add unsupported features to your builds, then you'll be responsible for tweaking your map files appropriately to make those unsupported features visible in your builds.
```

So this needs to be handled downstream.