JUpdaterExtension always sets client_id of extension to 1:
$this->current_update->client_id = 1;
This makes impossible of updating extensions which have 0 client_id.
I.e. I have a package with this update servers declaration:
no matter what .. section of my XML has - JUpdaterExtension always search for extension with client_id=1, so my package fails because packages have 0 client_id.
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