Refactor HAProxy network blacklist
    
    - move to a separate file for easier listing of many entries
    - extend list of Amazaon networks
    - add Alibaba (absurd connection count towards riesling and
      progressoo backends)
    - add DataForSEO (high connection count towards progressoo backend,
      seemingly only of commercial interest)
    
    Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>