Created Expected Errors (markdown)

Expected-Errors.md

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+As part of the deblobbing/removing calling home work on Jellyfin, there are a couple errors that are commonly generated and are not impacting. **_If you see these errors, you may safely ignore them._** They will be cleaned up fully in a future release that removes the callhome entirely.
+
+### Error HttpClient: Error NameResolutionFailure
+
+Errors like this are due to us changing the Emby callhome domain in the code, thus causing package downloads to fail.
+
+```
+2018-12-22 00:38:58.373 Info HttpClient: HttpClientManager GET: https://www.mb3admin.local/admin/service/EmbyPackages.json
+2018-12-22 00:38:58.589 Error HttpClient: Error NameResolutionFailure getting response from https://www.mb3admin.local/admin/service/EmbyPackages.json
+        *** Error Report ***
+        Version: 3.5.2.0
+        Command line: /usr/lib/jellyfin/bin/jellyfin.dll -programdata /var/lib/jellyfin -restartpath /usr/lib/jellyfin/restart.sh
+        Operating system: Unix 4.9.0.8
+        64-Bit OS: True
+        64-Bit Process: True
+        User Interactive: True
+        Processor count: 6
+        Program data path: /var/lib/jellyfin
+        Application directory: /usr/lib/jellyfin/bin
+        System.Net.WebException: No such device or address No such device or address ---> System.Net.Http.HttpRequestException: No such device or address ---> System.Net.Sockets.SocketException: No such device or address
+           at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken)
+           --- End of inner exception stack trace ---
+```