Require curl, not curl-minimal
    
    Requiring curl-minimal is not safe. The full curl package does
    not provide curl-minimal, and the two conflict. So if you have
    full curl installed, you cannot update, because installing
    curl-minimal to satisfy hplip's requirement would require the
    removal of full curl.
    
    curl-minimal provides curl, so for a quick fix, just changing
    this to "Requires: curl", which is satisfied by either. As a
    refinement we might be able to add something like
    "Suggests: curl-minimal" to 'cue' the use of curl-minimal rather
    than curl if neither is currently installed, but I just wanted
    to make the minimum change necessary to stop breaking openQA
    tests for now.