Check_MK Werk 5868: Fix duplicate search entries in check plugins search in WATO

ID: 5868 Title: Fix duplicate search entries in check plugins search in WATO Component: WATO Level: 1 Class: Bug fix Version: 1.5.0i4 Some check plugins are listed in several paths in the catalog of man pages (e.g. <tt>nfsmount</tt>). These would be listed twice in the search results of the WATO module {{Check plugins}}. This has been fixed.