Log Message:
Changes 2.4.14:
Lib/
* Added ldap.controls.openldap.SearchNoOpControl
* New method ldap.async.AsyncSearchHandler.afterFirstResult()
  for doing something right after successfully receiving but before
  processing first result
* Better log data written when invoking ldap.LDAPLock.acquire() and
  ldap.LDAPLock.release()
* LDAPObject and friends now pass `desc' to ldap.LDAPLock() which
  results in better logging
* ldapobject.ReconnectLDAPObject now uses internal class-wide
  lock for serializing reconnects
* Method signature of ReconnectLDAPObject.reconnect() changed to be able
  to call it with separate retry_max and retry_delay values
Modules/
* Added support for retrieving negotiated TLS version/cipher
  with LDAPObject.get_option() with the help of upcoming OpenLDAP libs