/** Compare an attribute in LDAP with our value
* @param i The LDAPInterface the result is sent to
* @param dn DN to use for comparing
* @param attr Attr of DN to compare with
* @param val value to compare attr of dn
/** Compare an attribute in LDAP with our value
* @param i The LDAPInterface the result is sent to
* @param dn DN to use for comparing
* @param attr Attr of DN to compare with
* @param val value to compare attr of dn