Enable network blacklist on Atlas http frontends
    
    The regular "http" frontend uses a network blacklist file.
    - adjust http-misc frontend to use the same blacklist file instead
      of custom IP addresses
    - adjust http-login frontend to use the same blacklist file, but
      utilizing the X-Forwarded-For header passed from the login proxy
    
    Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>