Typeahead (#3369): Parameternames has changed, configuration is possible on...

Typeahead (#3369): Parameternames has changed, configuration is possible on the Form and on the FormElement.
typeahead.php: if there is an exception, the message body is sent as regular 'content' for the dropdownbox. At the moment this is the only way to transmit any error messages.
Ldap.php: missing FE_TYPEAHEAD_LDAP_KEY_PRINTF, FE_TYPEAHEAD_LDAP_VALUE_PRINTF will be substituted by the other. If both missing, an exception is thrown.