(ITS#6257) libldap: getopt flag to return the SASL username

[michael]

Full_Name: Michael Ströder
Version: HEAD
OS: 
URL: 
Submission from: (NULL) (84.163.93.2)


libldap should be capable of returning SASL username obtained with
sasl_getprop( sasl_context, SASL_USERNAME, ... ) as result of ldap_get_option()