Check_MK Werk 7075: Fixed possible "omd backup" error when persisted sections change during backup

ID: 7075 Title: Fixed possible "omd backup" error when persisted sections change during backup Component: Site Management Level: 1 Class: Bug fix Version: 1.6.0i1 When persisted sections of Check_MK in <tt>var/check_mk/persisted/*</tt> and <tt>var/check_mk/persisted_sections/*</tt> vanished during the backup, the backup job could fail in previous versions.