bind with meta backend (ITS#2968)

[rouazana@linagora.com]

Full_Name: Raphael Ouazana
Version: 2.2.5
OS: Linux
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (194.98.7.155)


When I do a bind operation with a bad password, I get Success as result code,
instead of Invalid credentials.
I think the error is in back-meta/bind.c : there is a call to ldap_sasl_bind
instead of ldap_sasl_bind_s in function dgcp_back_do_single_bind.
In OpenLDAP 2.1.26, the call was ldap_bind_s, not ldap_bind.