Log Message:
Let ldap_sasl_bind() use interractive input

Interractive methods such as OTP use the ldap_sasl_bind() callback with
SASL_CB_ECHOPROMPT or SASL_CB_ECHONOPROMPT instead of SASL_CB_PASS. Add
the cases and treat them like SASL_CB_PASS for PHP 5.4.x and PHP 5.5.x.
The exop patch for PHP 5.6.x is broken right now and will be updated later.