new ddns script for polish service FreeDNS.42.pl where you can
host your own domains for free

Signed-off-by: Michal Lipka <michal@sysadmin.care>

(commits from PR #6150 squashed together)

- cloudflare v1 change syntax of option domain to "host.sub@example.com" like already cloudflare v4 and godaddy to prepare logterm remove of public_suffix_list.dat from package
- change Makefile to be backportable to CC15.05 and working on DD
- change ddns.defaults to prepare future releases of ddns-scripts
- minor fixes

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

- tld_names.dat.gz
  - rename to public_suffix_list.dat.gz
  - (re)created during build
  - new location /usr/share
- move services files to /etc/ddns
- new services
  - CloudFlare.com-v4 using API-Version 4 without using public_suffix_list.dat
  - GoDaddy.com
  - both depending on cURL package
  - both with modified syntax for option domain ( NEW: [host[.subdom]@]domain.tld )
- new service
  - Now-DNS.com formerly Now-IP.com
- service afraid.org now supports key-auth and basic-auth
- new command line options for dynamic_dns_updater.sh and dynamic_dns_updater.sh
- adapted ddns.init and ddns.hotplug to new command line options
- renaming config options inside section global

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

commands to apply changes introduced during release changes, moved from Makefile postinst to /etc/uci-defaults

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>