Merge of all PR and Fixes from parent project

• Coded at debian buster 10.10
• Some new features added :
  • new config option "use_proxy" (PR apt-mirror#48)
  • new config option "http_proxy" (PR apt-mirror#48)
  • new config option "proxy_user" (PR apt-mirror#48)
  • new config option "proxy_password" (PR apt-mirror#48)
  • new config option "user_agent" (fixes apt-mirror#146)
  • new config option "timeout"
    previously hard-coded, now the setup will affect on read, dns and connect timeout
  • new config option "tries"
    previously hard-coded
  • new config option "cookies_file"
    some server provide cookies, so we should provide cookies to legitimate cookie-full servers
  • new config option "dry_run" (PR apt-mirror#86)
  • new config option "max_redirect"
    reducing redirect attempt, to fasten Wget
  • new config option "ip_v6"
    some network problematic with ipv6
  • merge pull request (PR) apt-mirror#36, apt-mirror#40, apt-mirror#48, apt-mirror#77, apt-mirror#86, apt-mirror#95, apt-mirror#96, apt-mirror#100, apt-mirror#103, apt-mirror#105, apt-mirror#111, apt-mirror#112, apt-mirror#115, apt-mirror#116, apt-mirror#120, apt-mirror#127, apt-mirror#131, apt-mirror#136, apt-mirror#143
  • bz2 or xz or gz (buster-backports i18n xz) (fixes apt-mirror#130)
  • port number (fixes apt-mirror#19)