Check_MK Werk 7214: Interface checks: Introduce scan function API

ID: 7214 Title: Interface checks: Introduce scan function API Component: Checks & agents Level: 1 Class: New feature Version: 1.6.0i1 In the past conflicting check plugins with services called "Interface <ITEM>" could lead to a "duplicate services" warning on the discovery page. To avoid this issue in the future, all scan functions for those plugins are now located in the file "if.include". If you add a new "Interface <ITEM>"- service, please add the corresponding scan function to the file "if.include", and list in the dictionary <tt>_SPECIFIC_IF_SCANS</tt>. You can then access the scan function by specifying <tt> 'snmp_scan_function': get_snmp_if_scan_function('my_if_check')</tt> in your check plugin. The matching devices will then be automatically excluded from the generic if and if64 check plugin.