[SSSD] [sssd PR#103][opened] sudo: do not store usn if no rules are found

URL: https://github.com/SSSD/sssd/pull/103 Author: pbrezina Title: #103: sudo: do not store usn if no rules are found Action: opened PR body: """ When ldap doesn't contain any sudorule during the initial full refresh, usn is set to 1 instead of remaining unset and we are trying to search modifyTimestamp>=1 during smart refresh which doesn't return any result on openldap servers. How to test: Run sssd with no rules in ldap. Without the patch, full refresh stores usn=1 and smart refresh run search usn>=1. With this patch no usn is stored and smart refresh run generic request without usn part. Resolves: https://fedorahosted.org/sssd/ticket/3257 """ To pull the PR as Git branch: git remote add ghsssd https://github.com/SSSD/sssd git fetch ghsssd pull/103/head:pr103 git checkout pr103