title: Unable to unbind the ldap connection when there is an active query
body: <p>ldap_unbind_ext is blocked until the previously initaited ldap search is completed.</p>
  
  <p>I initiate search and unfortunately server takes 3+ minutes to respond.Meanwhile if I attempt to register to another server, the old connection should be tore down and a new connection should be established by my application.
  But,as there is an active query on the old connection,ldap_unbind_ext gets blocked until search is completed.</p>
  
  <p>I tried using ldap_abandon_ext before we call ldap_unbind_ext ,but now it blocks in ldap_abandon_ext .</p>
  
  <p>Could someone help me on this.
  Thanks in advance! </p>