Plugin manager: Check if the repository file is valid

[qgib]

Author Name: Matthias Kuhn (@m-kuhn)
Original Redmine Issue: 8111
Affected QGIS version: master
Redmine category:plugin_manager
Assignee: Borys Jurgiel

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The plugin manager now shows an error, if the domain could not be resolved or other network related errors.

If I enter a random valid and reachable URL which does not contain a repository file it looks as if the repository is being loaded, when in fact it's not. Also, the HTTP status code is not checked.
It would be nice and spare some people headache (e.g. when trying to load a repo from behind a proxy) if a meaningful error would be provided.)

[qgib]

Author Name: Borys Jurgiel (@borysiasty)

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Fixed in changeset "86bebab3cee614acee434edcba4b232ce64b07e2".

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• status_id was changed from Open to Closed