- no longer build public_suffix_list.dat.gz during build #3678
- replace "\s" with "[[:space:]]" inside Makefile because "\s" ignored by some sed versions
- tools/public_suffix_list.sh still available to rebuild public_suffix_list.dat.gz outside OpenWRT/LEDE build system

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

Get public_suffix_list.dat without using secure connection. #3678

File generated during build, because it's the only option to have an
actual version packaged.
Long term Cloudflare_v1 package will be changed to no longer need
public_suffix_list.dat

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>